______ 1. As an airplane climb. Its ______________ A. mass increases B. mass decreases C. weight increases D.weight decreases ______ 2. The weight of an object ______________ A. is the quantity of matter it contains B. refers to its inertia Force and Motion C. is the force with which it is attracted to the earth D. is basically the same quantity as its mass but expressed in different units ______ 3. The acceleration of gravity on Mars is 3.7 m/s. Compared with her mass and weight on the earth, an astronaut on Mars has ______________ A. less mass and less weight C. the same mass and less weight B. less mass and more weight D. less mass and the same weight ______ 4. A car that is towing a trailer is accelerating on a level road. The force that the automobile exerts on the trailer is ______________ A. equal to the force the trailer exerts on the automobile B. greater than the force the trailer exerts on the auto mobile C. equal to the force the trailer exerts on the road D. equal to the force the road exerts on the trailer ______ 5. When a carabao pulls a wagon, the force that causes the horse to move forward is the force ______________ A. he exerts on the wagon B. the wagon exerts on him C. he exerts on the ground D. the ground exerts on him ______ 6. The action and reaction forces referred to in Newton's third law of motion ______________ A. act on the same object B. act on different objects C. need not be equal in magnitude and need not have the same line of action D. must be equal in magnitude but need not have the same line of action ______ 7. Juan whose weight is 500 N is standing on the ground. The force the ground exerts on him is ______________ A. less than 500N B. equal to 500 N C. more than 500 N D. any of the above, depending on her location on the earth's surface ______ 8. A jumper weight presses down on the ground with force of magnitude F and becomes airborne as a result. The magnitude the force the ground exerted on the jumper must have been ______________ A. equal to w and less than F B. equal to w and equal to F C. more than w and equal to F D. more w than and more than F ______ 9. When an object exerts a normal force on a surface, the force is ______________ A. equal to the object's weight B. frictional in origin C. parallel to the surface D. perpendicular to the surface ______ 10. To set an object in motion on a surface usually requires ______________ A. less force than to keep it in motion B. the same force as that needed to keep it in motion C. more force than to keep it in motion D. only as much force as is needed to overcome inertia ​