Physics 9th Grade Summer Quiz #1

Question 1

What is the equation for GPE?

Accepted Answer

Mass * Gravity * Height

Question 2

What does SI stand for (in physics)?

Accepted Answer

System Internationale

Question 3

Math: If a 1200 kg car is going at 100 m/s, how much momentum does it have, in kg*m/sec?

Accepted Answer

120,000

Question 4

What is a hypothesis?

Accepted Answer

A claim that sets out to prove a point.

Question 5

What is the equation for free fall final speed (starting at rest?)

Accepted Answer

V = Gt

Question 6

What is the equation for Kinetic Energy?

Accepted Answer

1/2 * Mass * Final Velocity2

Question 7

What happens when mass is doubled, but the acceleration is the same?

Accepted Answer

The force doubles

Question 8

What is Newton's 1st Law also called?

Accepted Answer

The inertia law

Question 9

If an object has fallen for 3 seconds in free fall, how fast is it going (no initial speed)?

Accepted Answer

29.4 m/s

Question 10

Math: What is the amount of force over 10 seconds to stop a 3000kg car at 20 m/s?

Accepted Answer

6000 kg * m/s2

Question 11

What is speed?

Accepted Answer

The change in distance over the change in time., DeltaX/DeltaT

Question 12

Is light matter?

Accepted Answer

No

Question 13

What is Newton's First Law?

Accepted Answer

Mass will stay at rest, unless pushed by forces, vice versa.

Question 14

When a ball is in freefall, over time, what is the relationship between GPE and Kinetic Energy?

Accepted Answer

GPE goes down, Kinetic Energy goes up

Question 15

What are units for measuring mass?

Accepted Answer

kg, g, mg.

Question 16

What is inertia?

Accepted Answer

All of the above

Question 17

Why does an egg not crack when it hits a pillow but does when it hits the ground?

Accepted Answer

T is very large, so F is lower per the law of impulse

Question 18

____ create change, ____ resists it.

Accepted Answer

Forces, masses

Question 19

What is mass?

Accepted Answer

The measure of amount of atoms in an object., The amount of matter something has

Question 20

Which of these are the aspects of physics?

Accepted Answer

All of the above, Understanding Natural Laws, Describing the organization of the universe, Deducing and applying natural laws

Question 21

What is the best way to describe natural laws?

Accepted Answer

Rules that show why the universe acts the way it does

Question 22

What is a variable?

Accepted Answer

A factor that changes the system

Question 23

What is the calculation for acceleration?

Accepted Answer

Both answers are correct

Question 24

Is this equation true?: 1/2mvf2 + mgh = m*a*d

Accepted Answer

Yes

Question 25

If there is acceleration, how does a distance vs. time graph look like?

Accepted Answer

Exponential

Question 26

What is the difference between elastic and inelastic collisions?

Accepted Answer

Inelastic Loss of KE, changed shape, reverse for elastic.

Question 27

What are two ways to measure forces?

Accepted Answer

N, lbs.

Question 28

What is the relationship between Force and Energy?

Accepted Answer

Force * Distance = Joules, a unit of energy, Energy transfers through force

Question 29

What is Newton's 2nd Law?

Accepted Answer

F=MA

Question 30

Is there conservation of momentum?

Accepted Answer

Yes, momentum cannot be destroyed

Question 31

What are the three equations for no acceleration, relating time, speed and distance?

Accepted Answer

D = VT, T=D/V, V = D/T

Question 32

What is Work?

Accepted Answer

Mass * acceleration * Distance = Work

Question 33

What is Newton's Third Law?

Accepted Answer

When there is an action, there is a reaction force.

Question 34

What is matter?

Accepted Answer

The amount of space something takes up, and that has mass.

Question 35

What is impulse?

Accepted Answer

The amount of force * time to oppose the force, Ft = mv1 + mv2

Question 36

What is another way to write kg*m/s2?

Accepted Answer

N, Newtons

Question 37

What is a formula, relating d, a, t, and initial velocity?

Accepted Answer

d=V0t + 1/2at2

Question 38

What is momentum?

Accepted Answer

All of these answers are correct

Question 39

What is an abbreviation for acceleration?

Accepted Answer

All answers are correct

Physics 9th Grade Summer Quiz #1

Questions 39

Physics 9th Grade Summer Quiz #1

Questions 39