Forces and Motion Review

if an object stays still or continues moving at the same speed and in the same direction, it is a _______ force.

• weak

• strong

• balanced

• unbalanced

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NGSS.MS-PS2-2

Why is the net force 0 in the image?

• Because the elephants are the same size
• Because they are both pulling the same amount of force in opposite directions
• Because they are elephants
• Because they are pulling away from each other.

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NGSS.MS-PS2-1

Which one is balanced?

• top
• bottom
• both

Which type of force(s) will cause a change in an object's motion?

• gravity
• zero net force
• balanced forces
• unbalanced forces

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NGSS.MS-PS2-2

What is the net force?

• 5 N
• 45 N to the left
• 5 N to the right
• 45 N to the right

Tags

NGSS.MS-PS2-2

The measure of how fast an object is moving and what direction it is moving

• velocity

• force

• speed

• acceleration

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NGSS.MS-PS3-1

Imagine a place in the cosmos far from all gravitational and frictional influences (no outside forces). If a rock were moving in the air

• the rock will move at a constant speed

• the rock will slow down

• the rock will accelerate

• the rock will change direction

Select ALL statements that best describe the motion of the object represented in this position vs. time graph (D vs T)

• object is speeding up

• object is slowing down

• forces acting on the object are balanced

• forces acting on the object are unbalanced

• the object is stationary

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NGSS.MS-PS3-1

Are forces balanced or unbalanced when a car is moving at a constant speed in a straight line?

• Balanced
• Unbalanced

If the car in the diagram rolls faster and faster as it moves down the ramp, you can be sure that

• there is no friction acting on the object.

• the forces acting on it are unbalanced.

• the net force on the car is 0 N.

• only gravity is acting on the car.

Tags

NGSS.MS-PS2-2