2nd Quarterly Physics Terms

twice as much work

a 1000-kg car and a 2000-kg car are hoisted the same distance. raising the more massive car requires

the bottom

a ball rolling down an incline has its maximum kinetic energy at

if the mass of the bullet equals the mass of the gun

a bullet is fired from a gun. the speed of the bullet will be about the same as the speed of the recoiling gun

1 m/s

a rifle of mass 2 kg is suspended by strings. the rifle fires a bullet of mass 0.01 kg at a speed of 200 m/s. the recoil velocity of the rifle is about

move in the opposite direction, but at a lower speed

an astronaut, floating in outer space, throws a baseball. if the ball floats away at a speed of 20 meters per second the astronaut will

stopping time is longer on the carpet

compared to falling on a stone floor, a wine glass may not break when it falls on a carpeted floor because the

twice as much

if an object is raised twice as high, its potential energy will be

twice as much work

if you push an object twice as far while applying the same force, you do

no work on the wall is done in either case

if you push for a half hour or a whole hour against a stationary wall

increased the impact

padded dashboards in cars are safer in an accident than nonpadded ones because an occupant hitting the dash has

the top

the ball rolling down an incline has its maximum potential energy at

potential energy

when an automobile is braked to a stop its kinetic energy is transformed to

the small truck

which has less momentum, a large truck moving at 30 miles per hour or a small truck moving at 30 miles per hour

car

which would produce more force: driving into a very massive concrete wall with no "give," or having a head-on collision at the same speed with identical car moving toward you with the same speed

both the same

you're driving down the highway and a bug spatters on your windshield. which undergoes the greater change in momentum during the time of contact