Physics

30 terms by DAnn15

Study  only

Flashcards Flashcards

Scatter Scatter

Scatter Scatter

Create a new folder

If you push for a half hour or a whole hour against a stationary wall...

no work on the wall is done in either case.

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

twice as much work

If you push an object a given distance, while applying twice the force, you do...

twice as much work

unchanged

power

If you do work on an object in one-third the usual time, your power output is...

three times the usual power output

2 W

twice as much

twice as much

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

twice as much work

moving

location

40 J

heat

the top

the bottom

What task requires the most work; lifting a 50-kg sack 2 meters or lifting a 25-kg sack 4 meters?

both requires the same amount of work

the same

10 N

80 J

Two identical arrows, one with twice the kinetic energy of the other, are fired into a hay bale. The faster arrow will penetrate...

twice as far as the slower arrow

less than 100 J

10%

180 m

the 60 km/hr

5000 J

Two identical arrows, one with twice the speed of the other, are fired into a hay bale. The faster arrow will penetrate...

four times further than the slower arrow

A moving object has..

speed, velocity, momentum, and energy

potential energy

decreases

Example: