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Practice Quiz BASPHYS 2

Total questions: 75

Worksheet time: 19hrs 45mins

Name
Class
Date
1.

When is work done on an object?

a)

When an object has a net force applied to it.

b)

When an object moves while a net force is being applied to it

c)

When an object doesn't move while a net force is applied to it

d)

When an object is moving without a net force being applied to it

2.

When the weightlifter holds the weight above his head he may get incredibly tired, ...

a)

He is getting tired because he is doing work on the barbell of weights

b)

He is getting tired because his muscles are stretching and squeezing to do work on the barbell of weights

c)

He is now the equivalent of a table with weights on it.

d)

He is getting tired because his muscles are stretching and squeezing, but he is not doing work on the barbell of weights

3.

What just happened in this picture?

a)

The weight lifter did work by lifting the barbells from the floor to above his head.

b)

The weight lifter did not do work when lifting the barbells above his head.

c)

The weight lifter did no work because he is just a table for weights.

d)

The barbells did work on the weight lifter when lifted from the ground to above the weight lifters head.

4.

Which of the following examples has NO work being done? (Choose all that apply)

a)

An archer stretches her bowstring.

b)

An ant carries a leaf cutting from a tree to his colony

c)

An athlete does push-ups on the ground

d)

A book sits on the shelf

e)

An asteroid speeds across the solar system

5.

Which of the following examples has work being done? (Choose all that apply)

a)

An archer stretches her bowstring.

b)

An ant carries a leaf cutting from a tree to his colony

c)

An athlete does push-ups on the ground

d)

A book sits on the shelf

e)

An asteroid speeds across the solar system

6.

The units of measurement for work are?

a)

Newton

b)

Newton*meter

c)

Joule

d)

Watt

e)

Joule per second

7.

A kilojoule is how many joules?

a)

1

b)

100

c)

10,000

d)

100,000

e)

1,000

8.

A megajoule is how many joules?

a)

1

b)

100,000

c)

1,000

d)

1,000,000

e)

100

9.

Suppose that you apply a 100 Newton horizontal force to a box on the floor, which pushes the box 10 meters. How much work do you do on the box?

a)

100 J

b)

1 J

c)

1000J

d)

10000J

e)

1 kJ

10.

How do you calculate power?

a)

Amount of work done divided by the time interval during which the work is done.

b)

Amount of net force applied to an object multiplied by the distance the object moves

c)

Mass multiplied by acceleration

d)

Amount of momentum gained multiplied by the time interval in which the momentum was gained

11.

If a newer better engine has twice the power of an older engine, this means that the newer engine can do what? (Choose all that apply)

a)

The engine can do half the work in twice the time.

b)

The engine can do twice the work in the same amount of time.

c)

The engine can do the same amount of work in half the time.

d)

The engine can do twice the work in twice the time.

e)

The engine can do twice the work in half the time.

12.

What are the units of power?

a)

Watts

b)

Joules per second

c)

Joules multiplied by seconds

d)

Newtons multiplied by meters divided by seconds

e)

Horsepower

13.

One kilowatt is equal to how many watts?

a)

1

b)

10

c)

1,000

d)

10,000

e)

100,000

14.

What are the two forms of mechanical energy?

a)

elastic

b)

kinetic

c)

potential

d)

chemical

e)

gravitational

15.

To find gravitational potential energy on Earth we use which of the following equations?

a)

PE = m*g*h

b)

PE = m*v*d

c)

PE = m*g*s

d)

PE = m*g/h

e)

PE = m*v/g

16.

The work required to bring an object up to a final speed from rest is called what?

a)

gravitational potential energy

b)

chemical energy

c)

thermal energy

d)

potential energy

e)

kinetic energy

17.

The work required to slow down an object down to rest from some initial speed is called what?

a)

gravitational potential energy

b)

chemical energy

c)

thermal energy

d)

potential energy

e)

kinetic energy

18.

The kinetic energy of an object increases by what factor if the velocity is doubled?

a)

a factor of one half

b)

a factor of double

c)

a factor of triple

d)

a factor of quadruple

19.

The kinetic energy of an object increases by what factor if the mass is doubled?

a)

a factor of one half

b)

a factor of double

c)

a factor of triple

d)

a factor of quadruple

20.

The units of measurement for potential energy are?

a)

Newton

b)

Newton*meter

c)

Joule

d)

Watt

e)

Joule per second

21.

The units of measurement for kinetic energy are?

a)

Newton

b)

Newton*meter

c)

Joule

d)

Watt

e)

Joule per second

22.

At which point does the ball has the greatest gravitational potential energy (GPE)?

a)

A

b)

G

c)

D

d)

C

e)

G

23.

You throw a ball into the air as shown in the diagram. At what point does the ball have the most gravitational potential energy?

a)

W

b)

X

c)

Y

d)

Z

24.
What is mechanical energy?
a)
It is what metal creates when heated.
b)
All potential and kinetic energy in a system.
c)
It is motion of all matter.
d)
Energy of momentum.
25.

At which point in the picture must the cart have the most MECHANICAL energy?

a)

Point 1

b)

Point 2

c)

Point 3

d)

They would all be the same

26.

A rubber band that is pulled back waiting to "fly" has what type of energy?

a)

chemical potential

b)

electrical potential

c)

gravitational potential

d)

elastic potential

27.

When you turn on a lamp, electrical energy is converted to

a)

radiant energy

b)

sound energy

c)

chemical energy

d)

nuclear energy

28.

What is a force that opposes motion when two objects are in contact with each other called?

a)

applied force

b)

frictional force

c)

potential force

d)

thermal force

29.

The law of Conservation of energy states that energy can be transformed from one form to another, but it cannot be _______ or ________

a)

transformed, or created

b)

divided or multiplied

c)

radiated or conducted

d)

created or destroyed

30.

Which letter shows the ball when it has NO potential energy?

a)

B

b)

C

c)

D

d)

E

e)

F

31.

Which letter shows the ball when it has THE MOST kinetic energy?

a)

B

b)

C

c)

D

d)

E

e)

F

32.

Which letter shows the ball when it has THE MOST kinetic energy?

a)

B

b)

C

c)

D

d)

E

e)

F

33.

Which letter shows the ball when it has THE LEAST kinetic energy?

a)

A

b)

B

c)

C

d)

F

e)

G

34.

Which letter shows the ball when it is moving the fastest?

a)

B

b)

C

c)

D

d)

E

e)

F

35.
the equation for gravitational potential energy is 
a)
PEg = mgh
b)
PEg= 1/2kx2
c)
PEg= Fd
d)
PEg = 1/2mv2
36.

What happens when the ball goes from the highest position to the lowest position

a)

PE and KE increases and decreases together

b)

Impossible to know without knowing the mass of the object

c)

the PE decreases while KE increases

37.

According to the law of conservation of energy, energy can be created or destroyed.

a)

True

b)

False

38.
What units are used to measure energy?
a)
Watts
b)
Newtons
c)
Joules
d)
kilowatts
39.
What force ultimately slows the roller coaster to a stop?
a)
Applied
b)
Normal
c)
Friction
d)
Magnetic
40.
The momentum of an object depends upon the object's ___________&_____________.  
a)
size and shape
b)
mass and speed
c)
mass and veloctiy
d)
mass and energy
41.
The equation to calculate momentum is
a)
p=mv
b)
p=1/2mv2
c)
p=mgh
d)
p=mg
42.
Which has more momentum: a car stopped at a red light or a bike moving at 15 mph?
a)
car
b)
bike
c)
they are equal
d)
cannot determine using the info provided
43.
Momentum is a ____________________ quantity
a)
science
b)
scalar
c)
vector
d)
energy
44.
In any collision (crash) the ______ is ALWAYS constant
a)
Total Momentum
b)
total speed
c)
total Velocity
d)
Energy
45.
When two objects collide, the Pbefore is ____________ the Pafter.
a)
more than 
b)
less than 
c)
equal to
d)
unrelated to
46.
When the speed of an object is doubled, its momentum
a)
remains unchanged in accord with the conservation of momentum.
b)
doubles
c)
quadruples
d)
decreases
47.
What is the unit for momentum?
a)
m/sec
b)
kg/sec
c)
kg/m
d)
kg m/sec
48.
A 50 kg ball rolls down the street at 5 m/s. Calculate the momentum of the ball. 
a)
55 kg*m/s
b)
100 kg*m/s
c)
250 kg*m/s
d)
500 kg*m/s
49.
A 2.5 kg ball moving at 5 m/s collides with a 2.5 kg stationary ball in a perfectly elastic collision.  What is the velocity of the second ball after the collision? 
a)
5 m/s
b)
2.5 m/s
c)
10 m/s
d)
7.5 m/s
50.
A 9300 kg railroad car traveling at a velocity of 5 m/s strikes a second boxcar that weighs 5000 kg at rest. At what speed will the second boxcar move?
a)
18.6 m/s
b)
9.3 m/s
c)
7.5 m/s
d)
1.86 m/s
51.
Which object listed below has the greatest momentum?
a)
A 0.05 kg object rolling at 0.2 m/s.
b)
A 0.15 kg object rolling at 2 m/s.
c)
A 0.15 kg object rolling at 1 m/s
d)
A 0.4 kg object rolling at 2 m/s.
52.
Determine the momentum of 1000-kg car moving northward at 20 m/s......... 
a)
20000 N
b)
20000 Joules
c)
20000 Kg * m/s
d)
20000 kg * m/s north
53.
A 0.250 kg cart moving at 0.400 m/s has how much momentum?
a)
0.1 kg-m/s
b)
1 kg-m/s
c)
10 kg-m/s
d)
100 kg-m/s
54.
A person on a stationary skateboard throws a bowling ball with a velocity of 5.0 m/s. What is a possible speed of the person after the throw? 
a)
0 m/s
b)
1.5 m/s
c)
5.0  m/s
d)
7.5 m/s
55.
Two football players with mass 75 kg and 100 kg run directly toward each other with speeds of 6 m/s and 8 m/s respectively. If they grab each other as they collide, the combined speed of the two players just after the collision would be:
a)
2 m/s 
b)
3.4 m/s 
c)
4.6 m/s 
d)
7.1 m/s
56.
A biker with a mass of 75 kg moves along the path with a constant velocity of 5 m/s. What is the biker's momentum?
a)
25 m/s
b)
375 m/s
c)
25 kg m/s
d)
375 kg m/s
57.
The purpose of crumble zones on a car is to
a)
decrease time of impact.
b)
increase force of impact.
c)
increase the time of impact.
d)
decrease the impulse during impact.
58.

A constant force of 4.5 N acts on a 7.2-kg object for 10.0 s. What is the change in the object's momentum?

a)

45 kg m/s

b)

72 kg m/s

c)

32.4 kg m/s

d)

0.45 kg m/s

59.
In a physics experiment, two carts of mass 1.5 kg each are rolled towards each other.  The orange cart has a velocity of 2 m/s and the blue cart has a velocity of -1m/s.  The carts stick together when they collide.  Calculate their final speed.
a)
0.5 m/s
b)
1.0 m/s
c)
0.33 m/s
d)
0.67 m/s
60.
While playing pool, the white cue ball strikes the 8 ball. Before the collision, the cue ball's velocity was 10 m/s and the 8 ball was at rest. If both ball's have a mass of 0.15 kg and the cue ball's velocity after the collision is 2 m/s, what is the 8 ball's velocity?
a)
2 m/s
b)
8 m/s
c)
-2 m/s
d)
1.5 m/s
61.

Impulse is equal to:

a)

FΔxF\Delta x  

b)

mv − mvomv\ -\ mv_o  

c)

12mv2− 12mvo2\frac{1}{2}mv^{2^{ }}-\ \frac{1}{2}mv_o^2  

d)

ΔpΔt\frac{\Delta p}{\Delta t}  

62.

What is a term to indicate an elastic collision?

a)

Couple

b)

Stick

c)

Rebound

d)

Motion

63.

What is a term to indicate an inelastic collision?

a)

Bounce Off

b)

Rebound

c)

Motion

d)

Couple

64.

When two objects are both moving in a system, when summing the momentums it is important to pay attention to the

a)

direction of the velocity

b)

direction of the mass

c)

magnitude of the velocity

d)

magnitude of the mass

65.

Wearing a safety helmet is an effective way to protect your head from injury. In order for the force to ___________ on impact, the time to bring your head to a stop must ____________. This is done through adding padding in the helmet.

a)

decrease; increase

b)

increase; decrease

c)

increase; increase

d)

decrease; decrease

66.

The conservation of momentum states that the initial momentum into a system is ____________ to the final momentum out of a system.

a)

Greater than

b)

Less than

c)

Equal

67.

Momentum conservation applies to ________ systems.

a)

All

b)

Some

c)

No

68.

A golfer swings his golf club to strike a golf ball on a tee. If the golfer wants to apply the greatest force on the golf ball:

a)

Increase the time of contact with the golf ball

b)

Decrease the time of contact with the golf ball

c)

Increase the energy of the swing

d)

Decrease the energy of the swing

69.

What determines the direction of the impulse applied to an object?

a)

The magnitude of the force

b)

The magnitude of the velocity

c)

The direction of the force

d)

The time it takes to apply the force

70.

Which of the following has the greatest amount of momentum if all objects are moving the same velocity?

a)

A car

b)

A big rig truck

c)

A train

d)

A bicycle

71.

Impulse is equal to the

a)

Change in work of a system

b)

Change of energy of a system

c)

Change of momentum

d)

Change of time

72.

What type of relationship do force and time have in the impulse equation?

a)

Direct relationship

b)

Inverse relationship

c)

Indirect relationship

d)

Different relationship

73.

A soccer ball with a mass of 0.43 kg is kicked with a velocity of 15 m/s. If a basketball thrown with a mass of 0.62 kg has the same momentum as the soccer ball being kicked, how fast would it need to be thrown?

a)

6.45 m/s

b)

10.4 m/s

c)

9.3 m/s

d)

21.6 m/s

74.

A train car with a mass of 12,000 kg travels toward another train car at a speed of 0.60 m/s. The second train car has a mass of 13,500 kg and is at rest when it collides and couples with the first train car. At what final speed will the two train cars travel off together after the collision?

a)

0.28 m/s

b)

0.53 m/s

c)

0.60 m/s

d)

0.32 m/s

75.

A bowling ball with a mass of 6 kg is thrown down a lane with a velocity of 4.70 m/s toward a bowling pin with a mass of 1.6 kg at rest. If the bowling pin is struck and rebound off the bowling ball with a speed of 3.4 m/s in the same direction as the bowling ball was initially moving, what is the final speed of the bowling ball after the collision?

a)

3.8 m/s

b)

-8.1 m/s

c)

5.6 m/s

d)

0.91 m/s

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