Forces

A push or a pull that can move an object is a __________.

• gear

• lever

• force

• machine

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The force that opposes the motion of two surfaces sliding past each other is called ___________.

• acceleration

• inertia

• friction

• unbalanced

The force of gravity is responsible for which of these things?

• Keeping our planet in orbit around the sun.

• Keeping our moon in orbit around our planet.

• Letting things fall to the ground.

• All of the above.

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Which type of force resists motion?

• Friction

• Gravity

• Pull

• Push

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To drag a sofa over carpet, movers sometimes use slippery pads. Which force is reduced with the use of the pads?

• Friction

• Gravity

• Push

• Magnetism

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Which statement about the force of gravity is true?

• The smaller the masses of the two objects, the larger the effects of gravity between them.

• The smaller the distance between two objects, the larger the force of gravity between them.

• Distance affects the force of gravity, but mass does not.

• Mass affects the force of gravity, but distance does not.

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The force resulting from the pull of the earth on an object

• mass

• gravity

• acceleration

• unbalance

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What famous scientist was the unit of force named after?

• Isaac Newton

• Galileo Galilei

• Albert Einstein

• Charles Darwin

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Gravity is what type of force?

• push

• mean

• neutral

• pull

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What is the unit of force?

• Kilogram

• Meter

• Pascal

• Newton