Science U3 Test

Question 1

Static, sliding, and fluid

Answer 1

Friction

Question 2

Why is gravity a noncontact force?

Answer 2

Because there is not any physical touch.

Question 3

If John pushes 25N to the right and Jake pushes 75N to the left, what is the net force.

Answer 3

50N Left

Question 4

If a skateboard is pushed down a steep hill with a small updraft at the end where are the 2 unbalanced forces applied?

Answer 4

1 & 4

Question 5

The change of distance over time is an object’s?

Answer 5

Speed

Question 6

An object in _____ is changing position in relation to a reference point.

Answer 6

Motion

Question 7

F=ma?

Answer 7

Yes

Question 8

Velocity and acceleration are both _____ quantities, physical quantities with size and direction.

Answer 8

Vector

Question 9

A dog pushes a ball 0.25 kg with a net force of 4 N.

Answer 9

16

Question 10

What is the acceleration of a 20 kg backpack lifted with a force of 15 N?

Answer 10

0.75

Question 11

S=d/t?

Answer 11

Yes

Question 12

Energy from Electromatic Waves

Answer 12

Radiant Energy

Question 13

Energy From Motion

Answer 13

Kinetic

Question 14

Stored Energy

Answer 14

Potential

Question 15

Tendency not to change motion

Answer 15

Interia

Question 16

This defines the force required to unbalance a object.

Answer 16

Momentum

Question 17

W=Fd/J=Nm?

Answer 17

Yes

Question 18

What force causes coaster cars to slow down or stop?

Answer 18

Friction

Question 19

Newton’s first law best explains which of the following about roller coasters?

Answer 19

Why Roller Coaster require constant force.

Question 20

When motion begin how is energy transformed.

Answer 20

Potential -> Kinetic