Answer the following multiple choice questions.
Multiple choice 1) In which of these situations does the system 6)During a bowling match, a player rolls a bowling 10) You shove a chair with wheels (and let it go) and ball toward the last pin standing at the end of the experience a non-zero net force? A. An airplane cruising due north at a constant lane. The weight of the pin is 14 N. If we call "the it starts moving across the floor. However, the chair ball pushing the pin to the left with a force of 4 N' soon slows down and comes to a complete stop. To height at a speed of 300 mph. an action force, then the corresponding reaction keep B. A child sliding down a long water slide, starting force is the chair moving, you need to keep pushing on it. from a height of 50 m above the ground. A. the pin pushing the ball to the left with a force This simple experiment implies that C. A person riding a bicycle along a straight, smaller than 4 N. horizontal path and covering 15 miles each hour. B. the pin pushing the ball to the left with a force A. the action-reaction forces act on the chair and D. A train traveling at 70 km/h due south-east greater than 4 N. cancel each other. through a leveled valley. G the pin pushing the ball to the right with a force of B. Newton's first law, or the law of inertia, does not 4 N. apply to a chair moving horizontally. 2)An astronaut with a mass of 75 kg experiences a D. the pin pushing the ball to the right with a force C. the weight of the chair slows it down. force of gravity from the moon of 122.25 N smaller than 4 N. D. a net force in the direction opposite to the If he is positioned 1.73 x 106 m from the center of E the pin pushing the ball to the right with a force motion of the chair acts to slow it down. the moon, what is the mass of the moon' greater than 4 N. Remember that G = 6.67 x 10-11 m3/kg s2 F the pin pushing the ball to the left with a force of Newton's Law of Universal Gravitation: 11)A satellite is orbiting the Earth at an altitude of Fg = Gm, mz / d? 290 km. The Earth has a radius of approximately A. 4.2 x 1016 kg 7)Two objects in space, each of mass m, are 4,000 miles or 6,437 km. The Earth also has a B. We do not have enough information to calculate separated by a distance d. If the mass of one the moon's mass. object triples and the mass of the second object is mass of 6 x10"* kg. C. 2.1 x 108 kg cut in half, the distance between them quadruples. The force due to gravity on the satellite is: F=G D. 7.3 x 1023 kg What happens to the gravitational potential energy mlm2 in this two-body system? 3)A science class is conducting an egg drop lab to Recall that the gravitational potential energy U is This must be countered by a centripetal test out how momentum and impulse are related to given by: U =- G -mimz getting a better understanding of factors to consider ..where: acceleration of: F= mu when designing a lander. Before the students are G is the gravitational constant The centripetal acceleration on the satellite is 9.0 tasked with building a device to keep the egg whole m1 is the mass of one object m/s2. r damage), the teacher asks the m2 is the mass of the second object This is less than the acceleration due to Earth's students to brainstorm the methods of decreasing d is the distance between the objects the force experienced by the egg when it reaches gravity because the ground. A. The gravitational potential energy is 9/64 the A. the satellite is moving faster in space than it All of the following will decrease the force original value. does on Earth. experienced by the egg when it is dropped in the B. The gravitational potential energy is 9/16 the B. the Earth has less gravity in space. device EXCEPT original value. C. the satellite has a smaller mass in space. A. increasing the time over which the impact with C. The gravitational potential energy is 3/2 the original value. D. the satellite is farther from the Earth. the ground occurs B. decreasing the time over which the impact with D. The gravitational potential energy is 3/8 the the ground occurs. original value. C. decreasing the final velocity of the egg and E. The gravitational potential energy is 3/32 the original value. device upon impact with the ground 8)The bodies of many cars are designed to 4)The mass of the sun is 1.99 x 10 kg. The mass compress or crumple during an accident of Earth is 5.97 x 10" kg. The average distance Why are cars built with a crumple zone? A. The crumple zone is made from cheaper between them is 1.50 x 10" m . G is equivalent to materials, so it costs less to repair after an 6.67 x10". Fg = G (Mearth Mobject) / r accident. What is the gravitational attraction between Earth B The crumple zone increases the time of impact, and the sun? reducing the chance that passengers get injured. A. 3.52 x 1022 N C. The crumple zone transfers the force of an B 5.28 x 1011 N impact from the car to the object it hits, reducing C. 5.28 x 1033 N the chance that passengers will get injured. D 3.52 x 1044 N D. The crumple zone is made from cheaper materials, so the car costs less to make. 5)What is the magnitude of the gravitational force of attraction between two 0.425 kilogram soccer 9)An object starts from rest and falls freely for 40 balls when the distance between their centers is meters near the surface of planet P. If the time of fall is 4.0 seconds, what is the magnitude of the 0.500 meter? acceleration A. 4.82 x 10-11 N due to gravity on planet P? B. 5.67 x 10-11 N A 1.3 m/s? C. 1.13 x 10-10 N B. 0 m/s? D. 2.41 x 10-11 N C. 10. m/s2 D. 5.0 m/s? cin.. - harding makah a almond calls a bandin
