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Unit 3 Test

Total questions: 30

Worksheet time: 18mins

Name
Class
Date
1.

Force is most closely related to which of the following?

a)

Mass

b)

Weight

c)

Work

d)

Power

e)

Momentum

2.

Which of the following do you need to calculate Momentum?

a)

Mass

b)

Velocity

c)

Displacement

d)

Force

e)

Impulse

3.

Impulse is most closely related to which of the following?

a)

Mass

b)

Force

c)

Momentum

d)

Velocity

e)

Weight

4.

Which of the following are Vectors?

a)

Mass

b)

Force

c)

Velocity

d)

Momentum

e)

Work

5.

Two objects collide. They bounce away from each other at slower speeds than they were originally moving. What kind of collision was this?

a)

Elastic

b)

Inelastic

c)

Completely Inelastic

d)

Explosive

6.

Two objects collide. They bounce away from each other at the same speed they were originally traveling. What kind of collision was this?

a)

Elastic

b)

Inelastic

c)

Completely Inelastic

d)

Explosive

7.

Two objects collide. They stick together after the collision. What kind of collision was this?

a)

Elastic

b)

Inelastic

c)

Completely Inelastic

d)

Explosive

8.

Which of these best describes Eccentricity?

a)

The shape of a planet

(high eccentricity=rounder planet)

b)

The shape of a planet's orbit

(high eccentricity =rounder orbit)

c)

The shape of a planet

(low eccentricity=rounder planet)

d)

The shape of a planet's orbit

(low eccentricity =rounder orbit)

9.

Newton is responsible for which of the following?

a)


T=2π(√GM)r32 T=\frac{2π}{\left(√GM\right)}r^{\frac{3}{2}\ }

b)

F=G(m1m2)r2F=G\frac{(m_1m_2)}{r^2}

c)

G=6.67x10−11G=6.67x10^{-11}

d)

F=ma

10.

Kepler is responsible for which of the following?

a)


T=2π(√GM)r32 T=\frac{2π}{\left(√GM\right)}r^{\frac{3}{2}\ }

b)

F=G(m1m2)r2F=G\frac{(m_1m_2)}{r^2}

c)

G=6.67x10−11G=6.67x10^{-11}

d)

F=ma

11.

In which of these is momentum conserved?

a)

A collision where two objects stick together

b)

A collision where two objects bounce off of each other

c)

A collision where two objects explode apart violently

d)

A collision where an object deforms upon impact

12.

The mass on the left is 2 kg. If the bar is 1.5m on the left and 0.5m on the right, what is the other mass?

a)

2kg

b)

3kg

c)

4kg

d)

5kg

e)

6kg

13.

Children are playing on a merry-go-round. Who is experiencing the most centripetal force?

a)

The child spinning the merry-go-round while standing on the ground

b)

The child sitting comfortably in the middle of the merry-go-round

c)

The child hanging on for dear life on the edge of the merry-go-round

d)

The child flying through the air after falling off of the merry-go-round

14.

Centripetal force causes the tides. How?

a)

Centripetal force from the moon pulls on water on the near side of Earth

b)

Centripetal force from the Earth pushes water away on the far side from the moon

c)

Centripetal force is weak on the moon side of the Earth and lets water escape

d)

Centripetal force is weak on the side of Earth furthest from the moon and lets water escape

15.

Gravity causes the tides. How?

a)

Gravity from the moon pulls on water on the near side of Earth

b)

Gravity from the Earth pushes water away on the far side from the moon

c)

Gravity is weak on the moon side of the Earth and lets water escape

d)

Gravity is weak on the far side from the moon and lets water escape

16.

Which of these is an example of Kepler's First Law?

a)

There are two places a star can be in a planet's orbit

b)

Planets speed up when they are closer to their star

c)

A planet's time of orbit depends on the mass of the star it orbits

d)

A planet's time of orbit depends on the mass of the planet itself

e)

Planets speed up when they are far away from their star

17.

Which of these is an example of Kepler's Second Law?

a)

There are two places a star can be in a planet's orbit

b)

Planets speed up when they are closer to their star

c)

A planet's time of orbit depends on the mass of the star it orbits

d)

A planet's time of orbit depends on the mass of the planet itself

e)

Planets speed up when they are far away from their star

18.

Which of these is an example of Kepler's Third Law?

a)

There are two places a star can be in a planet's orbit

b)

Planets speed up when they are closer to their star

c)

A planet's time of orbit depends on the mass of the star it orbits

d)

A planet's time of orbit depends on the mass of the planet itself

e)

Planets speed up when they are far away from their star

19.

What do you need to know to solve for force due to gravity?

a)

constant G

b)

constant g

c)

mass

d)

distance

e)

velocity

20.

Which of the following are variables that can represent "distance"?

a)

D

b)

H

c)

R

d)

L

e)

Δx

21.

The force of gravity between two objects is 18 units. If the distance between the two objects is tripled, the mass of object one is tripled AND the mass of object two is halved, what will the new force of gravity be? (Do not include a label)

(a)  

22.

A 5.2-kg bowling ball and a 6.4-kg ball rest on a rack. If the force of gravity pulling the two balls together is 3.1 x10-9 N, what is the distance between them? (Round to Two Decimal Places and Include your Label!)

(a)  

23.

"A 90.0 kg running back runs towards the end zone at 5.45 m/s. A 105-kg linebacker moving at 4.15 m/s meets them in a head-on collision"

Which equation would you use to solve this problem?

a)

The Law of Conservation of Momentum

b)

The Rule of Balance

c)

The Law of Universal Gravitation

d)

Kepler's Second Law

e)

Newton's Third Law

24.

A meter stick hangs from a string. If there is a 3-kg mass 30 cm from the string on the left side, and a 2-kg mass 50 cm from the string on the right side, which way will the meter stick turn?

a)

Clockwise (Right Side Down)

b)

Counterclockwise (Left Side Down)

c)

The Stick Will Not Turn

25.

On the left there is a mass of 2kg at a distance of 50 cm and an unknown mass at a distance of 20cm. On the right there is a mass of 4kg at a distance of 70cm. What is the unknown's mass? (Include your label!)

(a)  

26.

The bottom-left mass is 1.5kg. The lower bar is 2m on the left and 3m on the right. The top bar is 1m on the left and 2m on the right. What is the total mass of the mobile? (Include your label)

(a)  

27.

Which of the following is the Rule of Balance?

a)

M1D1=M2D2

b)

M1V1=M2V2

c)

M1V1+M2V2=(M1+M2)Vf

d)

(GM)/R2

e)

T=rf

28.

Select all of the following that correctly match the Variable to the Unit:

a)

p; Ns

b)

J; Nm

c)

P; kg m/s

d)

J; Ns

e)

p; Nm

29.

"A 90.0 kg running back runs towards the end zone at 5.45 m/s. A 105-kg linebacker moving at 4.15 m/s meets them in a head-on collision"

Which person has more momentum?

a)

The Running Back

b)

The Linebacker

30.

Torque is most closely related to which of the following?

a)

Mass

b)

Weight

c)

Work

d)

Power

e)

Momentum

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