8th Grade Physics - Motion Part I

Question 1

A boat moving forward due to the paddling of oars backward is an example of __

Accepted Answer

Newton's 3rd Law

Question 2

Unless an object at rest is acted upon by a force, it stays at rest due to its __

Accepted Answer

inertia

Question 3

A car travelling at a steady 35 mph and rounding a corner is an example of __

Accepted Answer

acceleration

Question 4

A force pushing 50 N East against a force pushing 30 N West would move an object __

Accepted Answer

East

Question 5

(T/F) The more mass an object has, the easier it is able to accelerate.

Accepted Answer

False

Question 6

A rider does a 120-km bicycle trip in 3 hours. The average speed of the rider is __

Accepted Answer

40.0km/hr

Question 7

A unit of measurement for velocity would be __

Accepted Answer

25 m/s Southeast

Question 8

_______________can cause an object’s motion to change.

Accepted Answer

Gravity, An unbalanced force

Question 9

The amount of matter in an object is called its __

Accepted Answer

mass

Question 10

The unit of measurement for acceleration is___

Accepted Answer

m/sec2

Question 11

Newton’s Second Law states the relationship of mass, acceleration, and force. It says that __

Accepted Answer

Force equals mass times acceleration

Question 12

Adding rollers to the bottom of an object you want to move reduces its __

Accepted Answer

friction

Question 13

For every force there is an equal and opposite force is Newton's ________ Law of Motion.

Accepted Answer

Third

Question 14

(T/F) Unbalanced forces will cause an object to move.

Accepted Answer

True

Question 15

Speed measurements are given in units of __

Accepted Answer

distance/time

Questions 15