Forces and Motion

The speed of an object

• The same as velocity

• The same as acceleration

• How fast its position changes over time.

• It includes direction

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It is any push or pull

• speed

• force

• velocity

• acceleration

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A person pushing a cart is using what type of force?

• Contact force

• non contact force

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A compass needle swings to point north because of Earth’s magnetic force. The force that moves the needle is not touching it. This is an example of which type of force?

• contact forces

• noncontact forces

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The tendency of an object in motion to stay in motion or of an object at rest to stay at rest.

• Inertia

• Force

• Speed

• Gravity

A noncontact force that acts over a distance and pulls all objects toward each other. This is the force that keeps your feet on the ground.

• velocity

• speed

• gravity

• acceleration

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All are example of transforming energy except:

• A light bulb from electrical energy to light and thermal energy.

• A lawn mower from chemical to mechanical energy.

• Bert’s car colliding with Alonzo’s car.

• Walking - From chemical energy from your body to kinetic energy in your leg muscles.

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Energy is transformed when it changes from one form to another. An example is a solar panel transform light energy to electrical energy.

• True

• False

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Energy is transferred when it passes from one objec to another. An example of this is the Newton’s cradle, a toy that when you pull one ball up and release it, hits the other balls.

• True

• False

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The Law of Conservation of Energy states that energy cannot be created or destroyed. It can only change form.

• True

• False

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