Physics Exam 1 & 2 (Final)

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Northern Virginia Community College *

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Physics

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Dec 6, 2023

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Try Magic Notes and save time. Try it free Physics Final Exam 8 studiers today Leave the first rating Terms in this set (35) A rock has mass M and weight W on Earth ( where g=10 m/s2). If the same rock is taken to the Moon( where g=1.6 m/s2), what happens to its mass and its weight? mass stays the same but weight decreases Suppose a car has ZERO acceleration. This means _______ A) the car moves with constant speed B) car is at rest C) neither A nor B D) both A and B both A and B Action and reaction forces act on _______. different bodies A ball moves DOWN freely under the action of gravity near the Earth's surface. Then, the ball's___ velocity increases and acceleration stays the same A grocery cart is being pushed by a constant net force. If the total mass of the cart and its contents is doubled, the cart's acceleration ______ halves Physics Final Exam Displacement is a ______. vector 10/13/23, 6:15 PM Physics Final Exam Flashcards | Quizlet https://quizlet.com/528158666/physics-final-exam-flash-cards/ 1/8

In a round trip motion, when a moving body has the same starting and end point of the motion, the body's total (net) displacement will be _. zero Quantities that have both magnitude and direction are called _____ vectors You get a traffic ticket for your _______ speed. instantaneous Which control device makes your car have deceleration (negative acceleration) ? brake pedal Which control device makes your car have a positive acceleration ? gas pedal When you are moving on stairs, the power you exert while running on the stairs is the power you exert while walking on the stairs. greater than A rock of mass M falls down through a distance D against air resistance force. The work done by the gravitational force on the rock is _____ positive The power delivered to a body by a given force will be maximum if ___ _. more work is done in less time A dive was initially at rest on a diving board. There is no air resistance. As the diver falls down, the diver's ______ kinetic energy increases and potential energy decreases 10/13/23, 6:15 PM Physics Final Exam Flashcards | Quizlet Physics Final Exam https://quizlet.com/528158666/physics-final-exam-flash-cards/ 2/8

A box of mass M is lifted vertically through a height H. If the height is doubled, the potential energy of the box _. doubles A net force is exerted on a box, and the box moves through a distance D in the direction of the force. If the distance doubles, the work done on the box _. doubles If the same diver jumps on the Moon from the same height, the diver kinetic energy just before striking the water surface on the Moon will be _ ___ the kinetic energy just before striking the water surface on the Earth. less than If a car doubles its velocity, the car's kinetic energy _. quadruples If a car doubles its velocity, the car's momentum _. doubles As a ball falls down without air resistance, the momentum of the ball ________. increases An airbag is important for safety since it ________ _. reduces force on your body by extending the time your body takes to stop. A big car collides with a small car. During collision, the cars exert on same amounts of force and same amounts of impulse 10/13/23, 6:15 PM Physics Final Exam Flashcards | Quizlet Physics Final Exam https://quizlet.com/528158666/physics-final-exam-flash-cards/ 3/8

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