Physics Post Test Review Part 2

Which of the following best represents Newton's 1st law of motion?

• An object at rest remains at rest and an object in motion remains in motion at constant velocity unless acted upon by a net force.

• Net force equals mass times acceleration

• For every action there is an equal and opposite reaction.

Which of the following best represents Newton's 2nd law of motion?

• An object at rest remains at rest and an object in motion remains in motion at constant velocity unless acted upon by a net force.

• Net force equals mass times acceleration

• For every action there is an equal and opposite reaction.

The object shown is initially moving to the right. Describe the motion of this object based on its FBD

• It continues to move to the right with a constant velocity

• It moves to the right but speeds up

• It moves to the right but slows down

• It moves to the left

The object shown is initially moving to the right. Describe the motion of this object based on its FBD

• It continues to move to the right with a constant velocity

• It moves to the right but speeds up

• It moves to the right but slows down

• It moves to the left

The object shown is initially moving to the right. Describe the motion of this object based on its FBD

• It continues to move to the right with a constant velocity

• It moves to the right but speeds up

• It moves to the right but slows down

• It moves to the left

You are sitting in a car at a stop light. When the light turns green, the driver steps on the gas and you lurch backward in your seat. Why?

• When the driver steps on the gas there is a force from the air pushing them back into their seat

• Their body remains at rest until acted upon by a net force from the car seat

• The car is actually moving backwards

• There is a net force from your seatbelt pulling you backwards

Check all the boxes that apply.

• This object has a net force of 25 N down

• This object has a net force of 5 N down

• This object is accelerating down

• This object is at rest

• This object must be moving down

A 500 N boy exerts a 100 N force on his 15,000 N car which has run out of gas. Which of these is the weight of the boy?

• 500 N

• 0 N

• 100 N

• 15,000 N

Which of these is the unit for force?

• Newton

• Kilogram

• Meters per second squared

• Pounds

When looking at a free body diagram, which of the following types of motion would look the same?

• An object being at rest

• An object moving at a constant velocity

• An object accelerating