Two boxes of different mass are at rest. If both boxes are acted upon by equal force, which of the following statements is then true? O If both boxes are pushed for the same amount of time, then both boxes will have the same final momentum. If both boxes are pushed the same distance, then both boxes will have the same final momentum. If both boxes are pushed the same amount of time, then the lighter box will have the smaller final kinetic energy. O If both boxes are pushed the same amount of time, then the heavier box will have the greater final kinetic energy. The change in kinetic energy is dependent on the amount of time each box is pushed.

Jane and Jake are looking at what happens to body 1 of mass m and body 2 of mass 2m, initially at rest, when equal forces are applied separately to the two bodies. Jake says that equal forces applied for equal times do equal amounts of work on the two bodies. Jane says that the two forces do equal amounts of work only if the two bodies move equal distances in the direction of the forces. Which one, if either, is correct? O Jake, because the speed of body 1 is half the speed of body 2, but m¡v1= m2V2- O Jane, because work does not depend on mass, only on force times distance. O Jake, because all bodies travel equal distances when equal forces are applied for equal times. O Jane, because it takes the same time for all bodies to travel equal distances when equal forces are involved. O Neither, because we can't compare the amounts of work done on bodies of different mass.

Puck B has twice the mass of puck A. Starting from rest, both pucks are pulled the same distance across frictionless ice by strings with the same tension.a. Compare the final kinetic energies of pucks A and B.b. Compare the final speeds of pucks A and B.

A cart of mass 300 g moving along a straight track hits a 500 g cart which I've been sitting still. after the carts hit, the 300 g cart has a speed of 1 m/s back to where it came fromc while the 500 g cart is moving forward at 3 m/s in the same direction as the 300 g cart Had been going at the beginning. how fast was a 300 g cart going before it hit the 500 g cart?

Flavio-Ou X 74/285230207X ❖ 3 / 3 O 150% + 1 3) Two cars were involved in an accident, and you are trying to determine if either car exceeded to 25 mph speed limit. Car A weighs 3400 lb and was travelling north. Car B weighs 3100 lb and was travelling west. Through an energy analysis, a colleague found that immediately after the collision the cars were locked together as one and moved at 40 degrees to the north of the west direction at a speed of 30 ft/s. What was the speed of each car immediately before the collision? Also, how much energy was lost in the collision, and where did that energy go? S W N A B 4 63°F S

A 62.6 kg runner has a speed of 5.30 m/s at one instant during a long-distance event. HINT What is the runner's kinetic energy at this instant (in J)? J (b) How much net work (in J) is required to triple his speed? J

Two Pushed Boxes: Equal Time A lighter and heavier box are at rest on a frictionless surface. The same force pushes on each box for 1 s. Which box has the larger change in momentum after pushing? Lighter Heavier Insufficient Information Same Submit Answer Tries 0/2 Which box has the larger change in kinetic energy after pushing? Remember, the change in kinetic energy is equal to the work done. Insufficient Information Same Lighter Heavier

A 80. kg hockey goalie is standing with his skates straight ahead, so there is no friction between his skates and the ice.  In Play A, he catches a 0.20 kg hockey puck moving at 40. m/sec.  In Play B, he catches a 8.0 kg medicine ball moving in the same direction at 1.0 m/sec.  In which case is the goalie pushed back faster?  Explain your reasoning, or show supporting work.

Two boxes of different mass are at rest. If both boxes are acted upon by equal force, which of the following statements is then true? А. If both boxes are pushed for the same amount of time, then both boxes will have the same final kinetic energy. В. If both boxes are pushed the same distance, then the lighter box will have the greater final momentum. If both boxes are pushed the same amount of time, then the lighter box will have the smaller final kinetic energy. C. D. If both boxes are pushed the same amount of time, then the heavier box will have the greater final kinetic energy. Е. If both boxes are pushed the same distance, then both boxes will have the same final kinetic energy.

You are standing on a skateboard, initially at rest. A friend throws a very heavy ball towards you. You can either catch the object or deflect the object back towards your friend (such that it moves away from you with the same speed as it was originally thrown). What should you do in order to minimize your speed on the skateboard? O No answer text provided. O Catch the ball. Your final speed on the skateboard will be the same regardless whether you catch the ball or deflect the ball. O Deflect the ball.