Force and Motion Unit

According to Newton's first law of motion, what will happen to an object at rest if it is not acted upon by an outside force?

• It will start moving at a constant speed.

• It will remain at rest.

• It will move in a circular path.

• It will accelerate.

What does Newton's first law of motion state about an object in motion when not acted upon by an outside force?

• It will come to a stop.

• It will slow down gradually.

• It will remain in motion.

• It will change direction.

Which of the following is an example of the first part of Newton's first law of motion?

• A book falling off a desk.

• A book remaining on a desk until pushed or picked up.

• A car speeding up when the gas pedal is pressed.

• A ball rolling to a stop due to friction.

What happens to our bodies when the bus driver hits the brake, according to Newton's first law of motion?

• Our bodies will immediately stop with the bus.

• Our bodies will continue to travel forward at the same speed.

• Our bodies will fly upwards.

• Our bodies will start moving backwards.

According to Newton's second law of motion, what does the acceleration of an object depend on?

• The mass of the object only

• The amount of force applied only

• Both the mass of the object and the amount of force applied

• The speed of the object

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What is the SI unit of measurement for weight?

• Kilograms

• Meters

• Newtons

• Pounds

Newton's third law of motion states that for every action, there is an equal and opposite what?

• Motion

• Force

• Acceleration

• Mass

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What is an example of an applied force as described in the text?

• The gravitational pull of the Earth

• Pushing or pulling a desk across the room

• A bird flying past the window

• Books being placed on a cart

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How do scientists measure the size and direction of a force?

• In kilograms

• In meters

• In Newtons

• In pounds

What is friction?

• A force that speeds up an object

• The force that opposes the sliding motion between two surfaces

• The sum of all forces applied to an object

• A measure of how fast an object is moving