A 1,200 kg car traveling at 10 m/s hits a tree and is brought to rest in 0.10 s. What is the magnitude of the average force acting on the car to bring it to rest?

120 N

1,200 N

12,000 N

120,000 N

A 50 kg student threw a 0.4 kg ball with a speed of 20 m/s. What was the magnitude of the impulse that the student exerted on the ball?

8.0 N*s

78 N*s

400 N*s

1000 N*s

A 60 kg rollerskater exerts a 10 N force on a 30 kg roller skater for 0.2 seconds. What is the magnitude of the impulse applied to the 30 kg roller skater?

2.0 N*s

6.0 N*s

12 N*s

50 N*s

Two carts are pushed apart by an expanding spring as shown in the diagram below. 2 kg 1 kg If the average force on the 1 kg cart is 1 N, what is the average force on the 2 kg cart?A 1.2 kg block and a 1.9 kg block are initially at rest on a frictionless, horizontal surface. When a compressed spring between the blocks is released, the 1.8 kg block moves to the rig at 2.0 m/s, as shown below. 2.0 m/s 1.2 kg 1.8 kg Frictionless horizontal surface What is the speed of the 1.2 kg block after the spring is released?A 3.0 kg steel block is at rest on a frictionless horizontal surface. A 1.0 kg lump of clay is propelled horizontally at 6.0 m/s toward the block as shown in the diagram below. Steel block Clay 6.0 m/'s 3.0 kg 1.0 kg Frictionless surface Upon collision, the clay and steel block stuck together and move to the right with a speed ofThe diagram below shows an 8.0 kg cart moving to the right at 4.0 m/s about to make a head-on collision with a 4.0 kg cart moving to the left at 6.0 m/s. 8.0 kg 4.0 m/s 6.0 m/s 4.0 kg OO OO Frictionless, horizontal surface After the collision, the 4.0 kg cart moves to the right at 3.0 m/s. What is the velocity of the 8.0 kg cart after the collision?V = 1.5 m/s Box F = 15 N 5.0 kg Level surfaceA constant unbalanced force is applied to an object for a period of time. Which graph best represents the acceleration of the object with respect to time? Acceleration Acceleration Acceleration Acceleration Time Time Time Time (1) (2) (3) (4)The diagram below represents two forces acting on an object. Which vector below represents the force that will produce equilibrium with these two forces? (1) (2) (3) (4) O Vector 1 O Vector 2 O Vector 3 O Vector 4 Question 8 In the diagram below, two 20 N forces act concurrently on an object. North 20. N East 20. N What is the magnitude and direction of the force required to keep the block in equilibrium?Two forces, F1 and F2, are applied to a block on a frictionless, horizontal surface as shown below. F, = 12 N F, = 2 N Block Frictionless surface If the magnitude of the block's acceleration is 2 m/s', what is the mass of the block? O 1 kg 0 5kg 0 6 kg O 7 kg Question 11 Which graph best represents an object in equilibrium? Velocity Velocity Displacement Displacement Time Time Time Time (1 ) (2) (3) (4)\fThe vector diagram below represents the horizontal component, FH, and the vertical component, Fv, of a 24 N force acting at 35 degrees above the horizontal. Fy 24 N 35 F H What are the magnitudes of the horizontal and vertical components, ?Which graph best represents the motion of an object that is not in equilibrium as it travels along a straight line? Speed Distance Time Time (1 ) (3) Speed Distance Time Time (2) (4)A number of 1 N horizontal forces are exerted on a block on a frictionless. horizontal surface. Which too-view diagram shows the forces producing the greatest magnitude of acceleration of the block? 1.0 N [2] t4}