Newton's 2nd and 3rd laws

Because of inertia, an object in circular motion has a tendency to move away in a curved line.

• True

• False

The direction of the force that pulls an object in a circular motion is toward the ___________ of the circle.

• outside

• center

• left side

• right side

According to __________, the acceleration of an object is equal to the net force acting on the object divided by the object's mass. 

• Newton's Second Law

• Newton's Third Law

• Newton's First Law

A 20 kg bike accelerates at 10 m/s2.  what was the force

• 25 Newtons

• 20 Newtons

• 200 Newtons

• 10 Newtons

What is the net force?

• 40 N left

• 0 N Balalnced

• 400 N right

• 40 N right

A car is rounding a curve as shown in the diagram. Which arrow correctly shows the direction of the centripetal force keeping the car in circular motion?

• A

• B

• C

• D

A yo-yo is whirled on a string, then the string breaks. What causes the yo-yo to move off in a straight line?

• centrifugal force

• centripetal force

• inertia

• centripetal acceleration

The diagram shows an object traveling at a constant speed in a circular path. Which labeled arrow represents the centripetal force acting on the object?

• W

• Z

• X

• Y

Which of the following represent the direction the ball would travel if the centripetal force was removed?

• A

• B

• C

• D

Newton's Second Law can be expressed as

• v = d / t

• E = mc²

• F = ma

• m₁v₁ = m₂v₂