Identify the statements as being either True or False. a)A force of 5.0 N is app

Question

Identify the statements as being either True or False.

a)A force of 5.0 N is applied to a 20 kg mass on a horizontal frictionless surface. As the speed of the mass increases at a constant acceleration, the power delivered to it by the force decreases.

b)A train moves at a constant speed of 60 mph. A cannon is stationed on a flatcar moving with the train. The cannon has a muzzle velocity of 120 mph. If the gunner aims the cannon straight up and fires a cannonball, the kinetic energy of the cannonball at its highest point will be greater than zero.

c)Two blocks are released from the top of a building. One falls straight down while the other slides down a smooth ramp. If all friction is ignored, the block that went straight down will have the same speed when it reaches the bottom as the block that went down the ramp will have when it reaches the bottom

Explanation / Answer

a) False (Power increases)

b)True ( due to the presence of horizontal velocity)

c) True ( Energy Conservation)

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