Chapter 7.1 Describing Motion Quiz

Which sentence below describes a contact force? 

• A baseball bat hits a ball.

• A leaf floats in the air and falls to the ground.

• A magnetic force pulls a paper clip toward a magnet.

• A book falls to the floor

Distance and mass are factors that affect the force_________ of between two objects.

• thermal expansion
• magnetic repulsion
• electrostatic force
• gravitational attraction

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NGSS.MS-PS2-4

Magnetic force is an example of a(n)____________ force.

• non-contact
• contact
• attractive
• mechanical

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NGSS.MS-PS2-3

NGSS.MS-PS2-5

_______________is a force that always acts in the direction opposite of motion.

• Attraction
• Acceleration
• Friction
• Gravity

Which two characteristics do all forces have?

• Speed and time
• Color and shape
• Volume and weight
• Size and Direction

Which is an example of a noncontact force?

• electric force

• Applied

• Elastic

• Normal

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NGSS.MS-PS2-3

NGSS.MS-PS2-4

NGSS.MS-PS2-5

If the forces acting on an object are balanced, they must

• remain stationary
• result in a net force of 0 N.

• have a net force of 5
• accelerate in the opposite direction

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NGSS.HS-PS2-1

Which factor is NOT a characteristic of forces?

• Friction
• Weight

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NGSS.MS-PS2-4

Which factor is a contact force?

• Tension
• Magnetic field
• Applied Force

If the net force acting on an object is 0 N, you can be sure that the forces acting on the object are

• Static
• Balanced
• Unbalanced
• Accelerating