Forces

Question 1

If a box moves with a constant velocity, the forces are:

Accepted Answer

equal (balanced)

Question 2

Suzy pulls a sled using 15 N of force. There is a friction force of 5 N. What is the Net Force?

Accepted Answer

10 N

Question 3

Which of Newton's laws states: for every action there is an equal but opposite reaction?

Accepted Answer

Third

Question 4

If a nonzero net force is acting on an object, then the object is definitely

Accepted Answer

being accelerated

Question 5

A measure of the quantity of matter is

Accepted Answer

mass

Question 6

An object is in free-fall. Identify all the forces acting on the object:

Accepted Answer

Force of Gravity

Question 7

Another word for weight is:

Accepted Answer

Force of Gravity

Question 8

A 5 kg ball rolls across the floor with an acceleration of 2 m/s^2. What is the Net Force?

Accepted Answer

10

Question 9

In order for there to be a Net Force, there must be a(n):

Accepted Answer

acceleration

Question 10

Objects begin to move because:

Accepted Answer

The sum of the Forces are unbalanced

Question 11

A change in the gravitational force acting on an object will affect the object’s

Accepted Answer

weight

Question 12

In the free body diagram the box is being pulled with 20 N. The 3 N force is :

Accepted Answer

Friction Force

Question 13

What are the units of the coefficient of friction?

Accepted Answer

it does not have units

Question 14

George pushes on the wall. The action-reaction pair of forces would be:

Accepted Answer

Greg pushes on the wall. The wall pushes back on Greg

Question 15

Which has a greater acceleration? A car or a truck with twice the mass? (assume same Net Force)

Accepted Answer

The car

Questions 15