# Flashcard Set Preview

Side ASide B

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

twice as much work

A job is done slowly, while an identical job is done quickly. Both jobs require the same amount of work, but different amounts of

power

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

twice as much

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

the bottom

No work is done by gravity on a bowling ball that rolls along a bowling alley becauuse

the force on the ball is at right angles to the ball's motion

A jack system will increase the potential energy of a heavy load by 1000 J with a work input of 2000 J. The efficiency of the jack system is

50%

A moving object has

speed, velocity, momentum, and energy

A feather and a coin dropped in a vacuum fall with equal

accelerations

Which moves faster in m/s on a merry-go-round: a horse on the inside or a horse on the outside near the rim?

outside horse

An industrial flywheel has a greater rotational inertia when most of its mass is

nearest the rim

A coin and a ring roll down an incline starting at the same time. The one to reach the bottom first will be the

coin

Put a pipe over the end of a wrench when trying to turn a stubborn nut on a bolt, to effectively make the wrench handle twice as long, you'll multiply the torque by

two

When a twirling ice skater brings her arms inward, her rotational speed

increases

Consider a rotating donut-shaped space habitat where living quarters are on the inside surface farthest from the axis. If the rotational speed of the habitat increases, the apparent...

increases

For a system in mechanical equilibrium the resultant forces and torques must

both be zero

According to Newton, the greater the masses of interacting objects, the

greater the gravitational force between them

According to Newton, doubling the distance between two interacting objects

divides by 4 the gravitational force between them

What is the force of gravity on a 500 N woman standing on the Earth's surface?

500 N

The earth's gravitational field extends

both inside and outside the earth and throughout the entire universe

Which is most responsible for the ocean tides? the moon or the sun?

the moon

According to Kepler's laws, the paths of planets about the sun are

ellipses

Roll a bowling ball off the edge of a table. As it falls, its horizontal component of velocity

remains constant

An earth satellite is simply a projectile

freely falling around the earth

the fastest moving planet in a solar system is

the planet nearest hte sun

a "weightless" astronaut in an orbiting shuttle is

like the shuttle, pulled by earth's gravitation