Conceptual Physics Test Questions with All Correct Answers

Conceptual Physics Test Questions with All Correct Answers The momentum of an object is defined as the object's - Answer-mass times its velocity Which has more momentum, a large truck moving at 30 mph or a small truck moving at 30 mph? - Answer-the large truck Compared to a sports car moving at 30 mph, the same sports car moving at 60 mph has ____. - Answer-twice as much momentum The momentum change of an object is equal to the ____. - Answer-impulse acting on it In order to increase the momentum of a gold ball, we could _________. - AnswerIncrease the force acting on it, increase the time of contact with the ball, follow through when hitting the ball, and swing as hard as possible The reason padded dashboards are used in cars is that they _____. - Answer-increase the time of impact in a collision A ping-pong ball launcher is fired. Compared to the force on the ball, the force on the launcher is ____. - Answer-the same A ping-pong ball launcher is fired. Compared to the impulse on the ball, the impulse on the launcher is ______. - Answer-the same Suppose there is a girl standing on a pond where there is no friction between her feet and the ice. In order to get off the ice, she can ______. - Answer-Throw something in the opposite direction that she wants to go A freight train rolls along a track with considerable momentum. If it were to roll at the same speed but had twice as much mass, its momentum would be _____. - Answerdoubled A cannon recoils from launching a cannonball. The speed of the cannon's recoil is small because the ___. - Answer-cannon has far more mass than the cannonball Object A and Object B have the same size and shape, but Object A is twice as heavy as Object B. When they are dropped simultaneously from a tower, they reach the ground at the same time, but A has a higher _____. - Answer-momentum In order to catch a ball, a baseball player moves his or her hand backward in the direction of the ball's motion. Doing this reduces the force of impact on the players hand principally because ____. - Answer-the time of impact is increased A cannon fires a cannonball. The speed of the cannonball will be the same as the speed of the recoiling cannon ___. - Answer-if the mass of the cannonball equals the mass of the cannon The force of an apple hitting the ground depends upon ___. - Answer-air resisitance on the apple as it falls, the speed of the apple just before it hits, the time of impact with the ground and whether or not the apple bounces A moving freight car runs into an identical car at rest on the track. The cars couple together. Compared to the velocity of the first car before the collision, the velocity of the combined cars after the collision is ___. - Answer-one half as large Superman is at rest in space when he throws an asteroid that has more mass than he does. Which moves faster, Superman or the asteroid? - Answer-Superman While rollerblading, Granny collides with her tiny grandson Ambrose who is at rest. Ignoring any friction effects, Ambrose's speed after the collison will be greatest when __. - Answer-He and granny make a bouncing collision, each going seperate ways. True or False : Momentum is defined as an object's mass times it's velocity - AnswerTrue True or False : Impulse is defined as the force exerted on an object times the time it lasts - Answer-True True or False :When two objects collide and completely bounce apart with no lasting deformation or generation of heat, the collision is said to be elastic. - Answer-True True or False :Impulses are normally smaller when bouncing takes place - AnswerFalse True or False :Perfectly elastic collisions between large objects are uncommon in the everyday world. - Answer-True True or False : When a baseball player follows through when hitting a ball,the contact time with the ball is longer. - Answer-True True or False : Momentum is a scalar quantity - Answer-False In physics, work is defined as __. - Answer-force times distance The unit of work is the ___. - Answer-joule