Conceptual Physics Newton's Laws

Question 1

Which of the following scientists developed three basic laws of motion?

Accepted Answer

Newton

Question 2

When a rocket forces exhaust gases downward, the exhaust gases

Accepted Answer

exert an upward force on the rocket.

Question 3

In the equation F = ma, what does the "a" stand for?

Accepted Answer

acceleration

Question 4

Which of the following the equivalent to the weight force of 1 kilogram?

Accepted Answer

10 N

Question 5

If the upward support force (normal), and the downward force of weight are equal

Accepted Answer

acceleration is zero

Question 6

A pair of action-reaction forces always

Accepted Answer

occur simultaneously.

Question 7

When an object falls with ONLY the force of gravity acting on it, this is called

Accepted Answer

free fall

Question 8

If mass is doubled, what happens to acceleration?

Accepted Answer

It will be reduced by 1/2

Question 9

I feel confident in my knowlege of Newton's 3 Laws of Motion.

Accepted Answer

True

Question 10

Which term describes the ability of an object to resist changes in its motion?

Accepted Answer

inertia

Question 11

The fastest speed that an object can achieve during free fall is called

Accepted Answer

terminal velocity

Question 12

Which term describes either a change in velocity, or a change in direction?

Accepted Answer

acceleration

Question 13

The force of Earth's gravity is

Accepted Answer

10 m/s2

Question 14

You cannot exert a force on a wall

Accepted Answer

unless the wall simultaneously exerts the same amount of force on you.

Question 15

The direction of the force of friction is always in

Accepted Answer

a direction that is opposite to the motion

Question 16

When a tennis racquet hits a ball,

Accepted Answer

the ball hits the racquet.

Question 17

Which answers shows the two basic forms of friction?

Accepted Answer

dynamic and static

Question 18

What is the comparison of Earth's gravity and the moon's gravity?

Accepted Answer

Moon is 1/6th of Earth's gravity

Question 19

To say there is no such thing as only one force means

Accepted Answer

there must also be a corresponding reaction force.

Question 20

The SI unit of mass is the

Accepted Answer

kilogram

Questions 20