LONG TEST REVIEW

LONG TEST REVIEW

FORCE

It refers to the PUSH OR PULL that cause an object to change their motion or movement.

FORCES

• Make things move

• Change their speed

• Change their shape

Multiple Choice

What is the unit of force?

• Watt (W)

• Ampere (A)

• Newton (N)

• Volt (V)

ISAAC NEWTON

• The standard unit of force is newton (N).

BALANCED AND UNBALANCED FORCES

• Balanced: Forces that are EQUAL and OPPOSITE IN DIRECTION. This does not cause any change in motion.

• Unbalanced: One force is GREATER than the other. This causes a change in motion.

A force can be represented by an arrow.

The length of the arrow shows the strength of the force.

Multiple Choice

When you and your friend pull on the rope with the same amount of force, the forces are _____.

• decreased

• unbalanced

• balanced

• increased

Multiple Choice

Why did your friend fell when playing tug of war?

• he tripped

• balanced forces

• he was pushed

• unbalanced forces

Multiple Choice

A lamp sitting on a table.

• Balanced force

• Unbalanced force

Multiple Choice

A car accelerating around a mountain curve.

• Balanced force

• Unbalanced force

Multiple Choice

A rocket lifting off the launch pad.

• Balanced force

• Unbalanced force

Multiple Choice

A soccer ball sitting on the ground motionless.

• Balanced force

• Unbalanced force

Open Ended

When you throw a ball into the air, what made it fall back to the ground?

GRAVITY

The force of one object pulling on another object.

MASS

• The amount of matter that an object contains.

• An objects mass stays the same no matter where you are.

WEIGHT

• The force which an object is attracted toward another object.

Multiple Choice

It is a force that results when two objects rub against each other.

• Force

• Friction

• Motion

• Inertia

FRICTION

• The amount of friction between two objects depend on their texture, shape, speed, and weight.

• It acts in the direction opposite the direction of the object's motion.

Multiple Choice

Which surface produces a lot of friction?

• Rough surface

• Smooth surface