Lesson 2: Force and Acceleration

Forces that are equal in size but opposite in direction are called ___________________ forces.

• Balanced

• Equal

• Newton's

• Unbalanced

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NGSS.MS-PS2-1

According to Newton's second law of motion, a larger force acting on an object causes a greater __________________ of that object.

• Mass

• Acceleration

• Gravity

• Friction

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NGSS.MS-PS2-2

Acceleration depends on which two factors?

• Mass and position

• net force and mass

• mass and velocity

• position and net force

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Lizzie is pushing Alex on a scooter. Lizzie is pushing with 75N of force to the left, and Alex is helping with 20 N to the left. What is the net force on the scooter?

• 95 N, to the right

• 95 N, to the left

• 55 N, to the right

• 55 N, to the left

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NGSS.MS-PS2-2

Friction always acts in a direction ________________ to the direction of motion.

• perpendicular

• similar

• opposite

• parallel

Forces acting on a object that cause the object to accelerate.

• Unbalanced forces

• Balanced forces

• Newton's forces

• Mass forces

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NGSS.MS-PS2-2

If a net force acts on an object, the object may change speed, change direction or do neither.

• True

• False

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NGSS.MS-PS2-2

What is the net force on the object in the image.

• 20 N, to the left

• 20 N, to the right

• 4 N, to the right

• 4 N, to the left

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Which of the following is NOT considered a way an object can accelerate.

• Remain stationary

• Slow down

• Speed up

• Change direction

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Which example below describes Newton's First Law of Motion:

• A large skateboarder requires more force to accelerate to 25 mph.

• A skateboarder will bounce off the wall when they run into it

• A skateboarder will continue to roll down a hill until a force stops them down.

• A small skateboarder accelerates faster than a large skateboarder.