Chapter 4.1 Forces

A force has a _______ and ________.

• size, direction.

• size, weight

• weight, mass

• mass, direction

What is the unit of force?

• kilogram

• newton

• meter

• centimeter

How does force affect an object?

• it can change its speed and direction.

• it can change its mass and speed.

• it can change its speed and weight.

• it can change its weight and direction.

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What is acceleration?

• a push or pull on an object.

• it is a force that resists the sliding motion between two objects that are touching.

• it is a noncontact attractive force that exists between all objects that have mass.

• it is a change in an object’s velocity—its speed, its direction, or both.

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What force causes a dropped object to fall toward the ground?

• balanced force.

• unbalanced force.

• gravity.

• friction.

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What is noncontact force?

• a push or pull on an object.

• it is a force that resists the sliding motion between two objects that are touching.

• a force that pushes or pulls an object without touching it.

• it is a change in an object’s velocity—its speed, its direction, or both.

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What is a contact force?

• a push or pull on an object.

• it is a force that resists the sliding motion between two objects that are touching.

• it is a force is a push or a pull applied by one object to another object that is touching it.

• it is a change in an object’s velocity—its speed, its direction, or both.

What is friction?

• a push or pull on an object.

• it is a push or a pull applied by one object to another object that is touching it.

• it is a force that resists the sliding motion between two objects that are touching.

• it is a change in an object’s velocity—its speed, its direction, or both.

________ is a noncontact attractive force that exists between all objects that have mass.

• force.

• mass.

• gravity.

• friction.

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________ is the amount of matter in an object.

• force.

• mass.

• gravity.

• friction