Which statement is true about a moving object?
When an object is ....

• ...accelerating, the resultant force acting on it must be zero
• ... moving at a steady speed, the air resistance acting on it must equal zero
• ... moving at a steady speed, the resultant force acting on it must equal zero
• ... moving, there must be a resultant force acting on it.

Tags

NGSS.HS-PS2-1

A woman lifts 20 bricks, each of weight 6N.
What other information is needed to calculate the useful work done in lifting the bricks?

• the distance she lifts the bricks
• the mass of the bricks
• the time taken to lift the bricks
• the volume of the bricks

How far does the car travel before it reaches a steady speed?

• 10m
• 20m
• 100m
• 200m

Tags

NGSS.HS-PS2-1

Which statement is correct about a bottle of water?

• its mass at the North Pole is different from its mass at the Equator
• its mass is measured in newtons
• its weight and mass are the same thing
• its weight is one of the forces acting on it

•   A
•   B
•   C
•   D

Tags

NGSS.HS-PS2-1

Which statement about mass and weight is correct?

• Mass and weight are both forces
• Neither mass nor weight is a force
• Only mass is a force
• Only weight is a force

Tags

NGSS.MS-PS2-4

•    A
•   B
•    C
•    D

Tags

NGSS.MS-PS3-1

In a race, a car travels 60 times around a 3.6km track. This takes 2.4 hours. What is the average speed of the car?

• 1.5 km/h
• 90 km/h
• 144 km/h
• 216 km/h

Which quantity is measured in newtons?

• density
• energy
• pressure
• weight

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-5

Two forces act on an object.
In which situation is it IMPOSSIBLE for the object to be in equilibrium?

• The two forces act in the same direction
• The two forces act through the same point
• The two forces are of the same type
• The two forces are the same size

Tags

NGSS.HS-PS2-1