State Newton's second law An object will remain at rest or move in a straight line with a costant speed unless acted upon by a net force Any two objects in the universe attract each other with a force directly proportional to the product of their masses and inversely proportional to the square of the distance separating them The force acting on an object is inversely proportional to the acceleration produced by the force The force acting on an object is directly proportional to the acceleration produced by the force For every reaction, there is an equal but opposite reaction Calculate the force acting on a 6 443 kg object moving with an acceleration of 24 m s 2 A force that causes an acceleration of 7 m s 2 on an object of mass 20 123 kg is acting on a 50 kg object Calculate the acceleration of the 50 kg object The component of the surface force between two surfaces sliding on each other parallel to the surface is called friction gravitational force normal force contact force sliding force An object of mass 48 678 kg is sliding on a horizontal surface with a uniform speed The coefficient of kinetic fiction of the surfaces is 0 2 Calculate the force of friction exerted by the surface on the object An object of mass 18 333 kg is being pulled by a horizontal force of 210 N on a horizontal force The coefficient of kinetic friction between the object and the surface is 0 45 Calculate the acceleration of the object An object is being pulled on a horizontal surface by a horizontal force of 300 N If it s moving with a uniform speed, calculate the force of friction exerted by the surface on the object An object of mass 280 kg is being pulled on a friction less horizontal surface by means of two strings One of the strings is pulling forward, has a tension of 600 N and makes an angle of 30 degree with the horizontal right The other string is pulling backwards horizontally and has a tension of 20 N Calculate the acceleration of the object An object of mass 8 kg is being pulled on a horizontal surface by a string that makes an angle of 40 degree with the horizontal The tension in the string is 17 N Calculate the normal force exerted by the ground on the object A 16 kg object and a 7 kg object are attached by a string If the 7 kg object is being pulled by a force of 220 N Calculate their acceleration The SI unit of measurement for work is Volt Coloumb Joule Pascal Newton An object is being pulled to the left by a 80 N force that makes an angle of 70 deg with the horizontal left while moving to the right for a distance of 50 m Calculate the work done by the force Calculate the speed of an object of mass 42 333 kg if its kinetic energy is 1800 J Under the influence of some forces, the speed of a 21 325 kg object changed from 6 m s to a certain speed If the net work done on the object is 1450 J, Calculate its final speed An object has a kinetic energy of 120 J as it crosses a location where its potential energy is 19 J Calculate its mechanical energy as it crosses this location Under the influence of conservative forces only, an object is displaced from point A to point B Its potential energy and kinetc energy at point A are respectively 52 666 J and 60 554 J Its kinetic energy at point B is 40 J Calculate its potential energy at point B An object of mass 12 333 kg is located at the top of a 24 m tall building Calculate the gravitational potential energy of the object with respect to a point 1 m below the top of the building A roller coaster extends to the ground from a height of 40 m (point A) and then rises to a height of 19 m (point B) An object of mass 2 kg starts at point A with a speed of 8 m s Assuming the roller coaster is friction less, calculate the speed of the object by the time it reaches point B A spring extends by 0 8 m when an object of mass 3 kg hangs from it By how much will it extend when an object of mass 14 kg hangs from it Work done by the non conservative forces acting on an object is equal to the change in the mechanical energy of the object to the change in the kinetic energy of the object to the work done by the conservative forces to the change in the potential energy of the object to the net work done on the object Intially an object has a potential energy of 80 J and a kinetic energy of 190 J Under the influence of conservative and non conservative forces its potential energy changed to 30 J and its kinetic energy changed to 36 J Calculate the work done by the non conservative forces Calculate the momentum of an object of mass 0 36 kg moving with a speed of 4 8 m s An object of mass 0 16 kg falling vertically downward hits the ground with a speed of 12 m s and bounces back vertically upward with a speed 3 m s If the object was in contact with the ground for 0 2 seconds, calculate the average force exerted by the ground on the object An object of mass 9 5 kg was acted by a force of 24 2 N for 0 6 seconds If its initial speed was 2 0 m s, calculate its final speed An object of mass 4 kg moving with a speed of 25 m s to the right collides with an object of mass 17 kg moving with a speed of 12 m s to the left After collision, the 17 kg object moves to the right with a speed of 9 m s to the right Calculate the velocity of the 4 kg object after collision An object of mass 16 kg moving with a speed of 28 m s to the right collides with an object of mass 17 kg at rest If the collision is completely inelastic, calculate the kinetic energy lost during the collision Which of the following statements is a correct statement Colliding objects always lose kinetic energy during collision All collisions where momentum is conserved are called completely elastic collisions If colliding objects are treated as a single system, then the net force acting on the system is zero A collision where both momentum and kinetic energy are conserved is called a completely inelastic collision Kinetic energy is always conserved during a collision After a bullet of mass 0 06 kg is fired into a ballistic pendulum of mass 1 5 kg, the bullet is embedded in the pendulum and the pendulum rose to a height of 0 25 m Calulate the speed with which the bullet was fired into the ballistic pendulum An object of mass 11 kg going to the right with a speed of 30 m s collides with a(n) 16 kg object going to the left with a speed of 5 m s If the collision is completely elastic, calculate the speed of the 16 kg object after collision An object of mass 21 kg going to the right with a speed of 21 m s collides with a(n) 10 kg object at rest After collision the 21 kg object moves with a speed of 10 m s making an angle of 10 degree with the horizontal right Calculate the x component of the velocity of the 10 kg object after collision

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State Newton's second law. An object will remain at rest or move in a straight line with a costant speed unless acted upon by a

State Newton's second law.
1. An object will remain at rest or move in a straight line with a costant speed unless acted upon by a net force.
2. Any two objects in the universe attract each other with a force directly proportional to the product of their masses and inversely proportional to the square of the distance separating them.
3. The force acting on an object is inversely proportional to the acceleration produced by the force.
4. The force acting on an object is directly proportional to the acceleration produced by the force.
5. For every reaction, there is an equal but opposite reaction.
Calculate the force acting on a 6.443 kg object moving with an acceleration of 24 m s².
A force that causes an acceleration of 7 m s² on an object of mass 20.123 kg is acting on a 50 kg object. Calculate the acceleration of the 50 kg object.
The component of the surface force between two surfaces sliding on each other parallel to the surface is called
1. friction
2. gravitational force
3. normal force
4. contact force
5. sliding force
An object of mass 48.678 kg is sliding on a horizontal surface with a uniform speed. The coefficient of kinetic fiction of the surfaces is 0.2. Calculate the force of friction exerted by the surface on the object.
An object of mass 18.333 kg is being pulled by a horizontal force of 210 N on a horizontal force. The coefficient of kinetic friction between the object and the surface is 0.45. Calculate the acceleration of the object.
An object is being pulled on a horizontal surface by a horizontal force of 300 N. If it s moving with a uniform speed, calculate the force of friction exerted by the surface on the object.
An object of mass 280 kg is being pulled on a friction less horizontal surface by means of two strings. One of the strings is pulling forward, has a tension of 600 N and makes an angle of 30 degree with the horizontal-right. The other string is pulling backwards horizontally and has a tension of 20 N. Calculate the acceleration of the object.
An object of mass 8 kg is being pulled on a horizontal surface by a string that makes an angle of 40 degree with the horizontal. The tension in the string is 17 N. Calculate the normal force exerted by the ground on the object.
A 16 kg object and a 7 kg object are attached by a string. If the 7 kg object is being pulled by a force of 220 N. Calculate their acceleration.
The SI unit of measurement for work is
1. Volt
2. Coloumb
3. Joule
4. Pascal
5. Newton
An object is being pulled to the left by a 80 N force that makes an angle of 70 deg with the horizontal-left while moving to the right for a distance of 50 m. Calculate the work done by the force.
Calculate the speed of an object of mass 42.333 kg if its kinetic energy is 1800 J.
Under the influence of some forces, the speed of a 21.325 kg object changed from 6 m s to a certain speed. If the net work done on the object is 1450 J, Calculate its final speed.
An object has a kinetic energy of 120 J as it crosses a location where its potential energy is 19 J. Calculate its mechanical energy as it crosses this location.
Under the influence of conservative forces only, an object is displaced from point A to point B. Its potential energy and kinetc energy at point A are respectively 52.666 J and 60.554 J. Its kinetic energy at point B is 40 J. Calculate its potential energy at point B.
An object of mass 12.333 kg is located at the top of a 24 m tall building. Calculate the gravitational potential energy of the object with respect to a point 1 m below the top of the building .
A roller coaster extends to the ground from a height of 40 m (point A) and then rises to a height of 19 m (point B). An object of mass 2 kg starts at point A with a speed of 8 m s. Assuming the roller coaster is friction less, calculate the speed of the object by the time it reaches point B.
A spring extends by 0.8 m when an object of mass 3 kg hangs from it. By how much will it extend when an object of mass 14 kg hangs from it.
Work done by the non conservative forces acting on an object is equal
1. to the change in the mechanical energy of the object
2. to the change in the kinetic energy of the object
3. to the work done by the conservative forces
4. to the change in the potential energy of the object
5. to the net work done on the object
Intially an object has a potential energy of 80 J and a kinetic energy of 190 J. Under the influence of conservative and non-conservative forces its potential energy changed to 30 J and its kinetic energy changed to 36 J. Calculate the work done by the non-conservative forces.
Calculate the momentum of an object of mass 0.36 kg moving with a speed of 4.8 m s.
An object of mass 0.16 kg falling vertically downward hits the ground with a speed of 12 m s and bounces back vertically upward with a speed 3 m s. If the object was in contact with the ground for 0.2 seconds, calculate the average force exerted by the ground on the object.
An object of mass 9.5 kg was acted by a force of 24.2 N for 0.6 seconds. If its initial speed was 2.0 m s, calculate its final speed.
An object of mass 4 kg moving with a speed of 25 m s to the right collides with an object of mass 17 kg moving with a speed of 12 m s to the left. After collision, the 17 kg object moves to the right with a speed of 9 m s to the right. Calculate the velocity of the 4 kg object after collision.
An object of mass 16 kg moving with a speed of 28 m s to the right collides with an object of mass 17 kg at rest. If the collision is completely inelastic, calculate the kinetic energy lost during the collision.
Which of the following statements is a correct statement.
1. Colliding objects always lose kinetic energy during collision.
2. All collisions where momentum is conserved are called completely elastic collisions.
3. If colliding objects are treated as a single system, then the net force acting on the system is zero.
4. A collision where both momentum and kinetic energy are conserved is called a completely inelastic collision.
5. Kinetic energy is always conserved during a collision.
After a bullet of mass 0.06 kg is fired into a ballistic pendulum of mass 1.5 kg, the bullet is embedded in the pendulum and the pendulum rose to a height of 0.25 m. Calulate the speed with which the bullet was fired into the ballistic pendulum.
An object of mass 11 kg going to the right with a speed of 30 m s collides with a(n) 16 kg object going to the left with a speed of 5 m s. If the collision is completely elastic, calculate the speed of the 16 kg object after collision.
An object of mass 21 kg going to the right with a speed of 21 m s collides with a(n) 10 kg object at rest. After collision the 21 kg object moves with a speed of 10 m s making an angle of 10 degree with the horizontal-right. Calculate the x-component of the velocity of the 10 kg object after collision.