Force and Motion

When a person sits in a chair, they apply a force to the chair. The chair:

• applies a larger force on the person in the opposite direction.

• applies the same size force on the person in the same direction.

• applies the same size force on the person in the opposite direction.

• does not apply a fore on the person.

Tags

NGSS.MS-PS2-1

A car accelerates down the road. What is the "reaction" to the tires pushing on the road?

• The road pushing an opposite force back on the tires.

• The air in the tires moving the car.

• The mass of the car pushing on the tires.

• The road moving away from the tires.

Tags

NGSS.MS-PS2-1

An object with a mass of 5 kg collides with an object with a mass of 4 kg. During the collision, the more massive object accelerates at a rate of 2 m/s2. What is the acceleration of the less massive object in m/s2? (The amount of force being applied onto both objects is the same in this scenario).

• 1.5

• 2

• 3

• 2.5

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A bowling ball collides with a bowling pin.

Describe the forces applied by the interacting objects during the collision.

• The bowling ball applies a force to the bowling pin, and at the same time, the bowling pin applies no force at all back on the bowling ball.

• The bowling ball applies a force to the bowling pin, and at the same time, the bowling pin applies an equal force in the opposite direction to the bowling ball.

• The bowling pin applies an unequal force onto the bowling ball and the bowling ball stops instantly.

Tags

NGSS.MS-PS2-1

A typical bowling pin has a mass of 1.5 kg. A typical bowling ball has a mass of 5 kg. Will both objects experience the same changes in motion as a result of the collision? Explain why or why not.

• Both objects will experience the exact same change in motion. This is because the mass of the object is not a factor in force and motion relationships.

• The objects will not have the same change in motion. This is because the bowling ball is more massive than the bowling pin. A less massive object will experience a larger change in motion than a more massive object when the same force is applied to both.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

If there is no force acting on a moving object, it will:

• continue moving at the same speed.

• continue moving at the same speed and in the same direction.

• continue moving in the same direction.

• eventually slow down and stop.

What does it take to change the direction or speed of an object?

• An unbalanced force

• More than one force

• No force

• A balanced force

Tags

NGSS.MS-PS2-2

Which of the following describes an object that is speeding up? The object is:

• at rest

• in a frictionless environment

• moving with constant speed

• accelerating

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

A block sits on a very smooth surface. Joey pushes it to the left with a force of 500 N. At the same time, Chanel pushes it to the right with a force of 100 N.

Which diagram below accurately represents the forces acting on the box?

• 
• 
• 
• 

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Does the block in the shown picture move? Why or why not?

• No this block has an balanced amount of forces that are pushing from both sides and so the block will Not move.

• Yes this block has an unbalanced amount of forces that are pushing on it, and so the block will move. It will move to the left, because its net force is 400 N being pushed to the left side of the screen.

Tags

NGSS.HS-PS2-1