Forces, Motion, and Simple Machines

Which is true about simple machines?

• They are not very large machines.

• They take a long time to make.

• They have few or no moving parts.

• The need electricity to work.

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What is an example of kinetic energy?

• a flashlight battery

• a standing bicycle

• a stopped roller coaster

• a horse running through a field

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A soccer ball is kicked twice. The second time, it is kicked with three times as much force. Which is most likely to happen to the ball?

• The ball will go three times as far.

• The ball will not move.

• The ball will go half as far as before.

• The ball will move the exact same distance.

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Which force slows things down and creates heat?

• Inertia

• Energy

• Friction

• Unbalanced forces

A kite is on the ground. To make the kite fly through the air, the wind must create a _____ against the kite.

• magnet

• force

• weight

• velocity

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What is the correct formula to find speed?

• speed = distance $\div$ time

• speed = distance $+$ time

• speed = distance $-$ time

• speed = distance $+$ velocity

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A _______ is defined as a push or a pull.

• Acceleration

• Speed

• Force

• Energy

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This force causes items to fall back down to Earth after they are thrown in the air.

• Speed

• Gravity

• Newton's Law

• Push

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Two people of equal strength are arm wrestling, so their arms are not moving. This is an example of...

• Friction

• Gravity

• Balanced Forces

• Unbalanced Forces

A car is increasing in speed. That means it has ________.

• Positive Acceleration

• Negation Acceleration

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