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Physics Fall BM 3

Total questions: 60

Worksheet time: 2hrs 36mins

Name
Class
Date
1.

In an investigation in class, students timed three motorized carts rolling across the floor of their classroom. The graph below shows the position vs. time for all three motorized carts.


Which of the following statements about the motion of the three cars is correct?

a)

Car B is the fastest because it traveled the same distance as the other two cars but in a shorter time.

b)

Car C was faster than Car B but slower than Car A because it had a greater average speed.

c)

Car A is the fastest because it traveled a greater distance than the other three cars in the same time.

d)

Car A traveled the greatest distance across the floor in the shortest time.

2.
The rate at which velocity changes is known as __________
a)
acceleration
b)
net force
c)
speed
d)
velocity
3.
What is the definition of speed?
a)
Distance/Time
b)
Change in velocity/Time
c)
A change in momentum
4.

acceleration unit

a)

m/s2

b)

feet/s2

c)

km/hr/s

d)

cm/s2

5.

velocity unit

a)

m/s

b)

m/s2

c)

km/s

d)

km/s2

6.

The slope of the position vs time graph represents

a)

acceleration

b)

velocity

c)

displacement

7.

What is the acceleration at the apex of a y-direction problem?

a)

Depends on the problem

b)

9.8 m/s2

c)

-9.8 m/s2

d)

Positive on the way up and negative on the way down

8.
A cheetah travels 75 m in 3 s. What is her velocity over the interval?
a)
225 m/s
b)
25 m/s 
c)
0.04 m/s
9.

In Newtonian physics, ________________ is any motion of a body where gravity is the only force acting upon it.

a)

kinematics

b)

free fall

c)

mechanics

d)

velocity

10.

Heavier objects free fall faster than lighter objects.

a)

True

b)

False

11.
Which would hit the ground first if dropped from the same height in a vacuum—a feather or a metal bolt?
a)
the feather
b)
the metal bolt
c)
They would hit the ground at the same time.
d)
They would be suspended in a vacuum.
12.
Does horizontal velocity change if you ignore air resistance?
a)
yes
b)
no
13.
What is the horizontal acceleration of a projectile?
a)
0 m/s2
b)
-9.8 m/s2
14.

A cannon ball is fired horizontally at a height of 1.3 meters at a velocity of 950 m/s. Assume no air resistance. How long until the bullet reaches the ground?

a)
0.52 s
b)
0.27 s
c)
0.13 s
d)
0.36 s
15.

The curved path that an object follows when thrown, launched, or otherwise projected near the surface of the Earth.

a)

Resultant vector

b)

Parabolic motion

c)

Projectile motion

d)

Circular motion

16.

The parabolic path of a projectile through the air.

a)

Launch angle

b)

Range

c)

Trajectory

d)

Horizontal range

17.

Represents the sum of two or more vectors.

a)

Vertical vector

b)

Resultant vector

c)

Horizontal vector

d)

Parabolic vector

18.

An object that is thrown or launched into the air.

a)

Projectile

b)

Range

c)

Trajectory

d)

Cannon ball

19.

When only the force of gravity is acting on a falling body.

a)

Free fall

b)

Trajectory

c)

Range

d)

Projectile

20.
an object that has both a magnitude and a direction.
a)
vector
b)
component
c)
resolution
d)
projectile
e)
free fall
21.

a push or pull on an object

a)

friction

b)

force

c)

inertia

d)

momentum

22.

Is the force usually exerted by a surface on an object that is resisting against it.

a)

Friction

b)

Normal force

c)

Elasticity

d)

Tension

23.
Force is measured in....
a)
Galileos 
b)
Newtons
c)
Di Vincis
d)
Einsteins 
24.
The dog's force is?
a)
Applied
b)
Normal
c)
Gravitational
d)
Magnetic
25.
A force that does not physically touch the object
a)
contact force
b)
non-contact force
c)
unbalanced forces
d)
balanced forces
26.

An objects distance and direction from a reference point.

a)

position

b)

reference point

c)

motion

d)

speed

27.

The tendency of an object to resist a change in motion.

a)

inertia

b)

gravity

c)

motion

d)

vector

28.

An object at rest stays at rest and an object in motion stays in motion unless acted on by an unbalanced force.

a)

Newton's First Law

b)

Newton's Second Law

c)

Newton's Third Law

d)

Newton's Fourth Law

29.

Force equals mass times accelertion

a)

Newton's First Law

b)

Newton's Second Law

c)

Newton's Third Law

d)

Newton's Fourth Law

30.

For every action there is an equal and opposite reaction.

a)

Newton's First Law

b)

Newton's Second Law

c)

Newton's Third Law

d)

Newton's Fourth Law

31.

Energy can not be created or destroyed.

a)

Mechanical Energy

b)

Law of Conservation of Energy

c)

Chemical Energy

d)

Nuclear Energy

32.

the product of an object's mass and its velocity

a)

gravity

b)

momentum

c)

weight

d)

speed

33.

law stating that the total momentum of a system does not change if no net force acts on the system

a)

law or conservation of inertia

b)

law of conservation of charge

c)

law of conservation of mass

d)

law of conservation of momentum

34.
What is tension force?
a)
The force exerted by a surface perpendicular to an object in contact with it
b)
The force exerted by a rope when pulled
c)
The force that opposes motion due to the contact between surfaces
d)
The force that pulls an object downwards
35.
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
36.

The equation to calculate momentum is

a)

p = m x v

b)

p = 1/2 m x v2

c)

p = m x g x h

d)

p = m x g

37.
Determine the momentum of 1000-kg car moving southward at 20 m/s......... 
a)
20000 N
b)
20000 Joules
c)
20000 Kg * m/s south
d)
10000 kg * m/s south
38.

In order for an object to have momentum it must be ________

a)

moving

b)

motionless

c)

alive

d)

asleep

39.

A collision in which two objects stick together after colliding is called ...

a)

perfectly elastic collision

b)

perfectly inelastic collision

c)

elastic collision

d)

conserved collision

40.
The definition of momentum is
a)
Mass in Motion
b)
The size of an object
c)
The velocity of an object
d)
A comparison between two objects
41.
A 40-kilogram mass is moving across a horizontal surface at 5.0 m/s.  What is the magnitude of the net force required to bring the mass to a stop in 8.0 seconds?
a)
1 N
b)
40 N
c)
25 N
d)
5 N
42.
Which takes more force  to catch, a bowling ball or a ping pong ball?
a)
bowling ball because it has more momentum
b)
ping pong ball because it has more momentum
c)
both require the same amount of force when catching
d)
bowling ball because it has less momentum
43.
How can a tennis ball and a bowling ball have the same momentum?
a)
have the same speed
b)
have different speeds
c)
one is moving backwards
d)
they can't
44.
While playing pool, Emma notices that the pool balls bounce apart.  What type of collision is this?
a)
Elastic
b)
Inelastic
c)
Explosive
d)
Force
45.
Jorge noticed a collision outside the coffee shop where two cars collided and stuck together.  What type of collision did he observe?
a)
Elastic
b)
Inelastic
c)
Completely inelastic
d)
none
46.

Collisions where objects BOUNCE apart.

a)

inelastic collisions

b)

elastic collisions

c)

explosions

d)

none of these

47.

Collision where objects collide, and stick together.

a)

inelastic collision

b)

elastic collision

c)

explosion

d)

none of these

48.

Two objects are rest push off each other and one with a mass of 35kg moves to the right at 2m/s, the other moves to the left at 3.2 m/s. What is the mass of object 2?

a)

21kg

b)

5.5 kg

c)

22kg

d)

56 kg

49.
Calculate the KE of a runner that has a mass of 80 kg and is running at a velocity of 8 m/s
a)
5120 J
b)
320 J
c)
640 J
d)
2560 J
50.
____________ is the ability to cause change. 
a)
Energy 
b)
Force 
c)
Friction
d)
Motion
51.
__________ is stored energy. 
a)
Potential
b)
Kinetic
c)
None of the above 
d)
All of the above 
52.

What is the potential energy of a 47 kg kangaroo that is resting on top of 45m tall ledge?

a)

2115 Joules

b)

47587.5 Joules

c)

20727 Joules

d)

20727 Watts

53.

You raise a bucket of water from the bottom of a well that is 12 m deep. The mass of the bucket and the water is 5.00 kg, and it takes 15 s to raise the bucket to the top of the well. How much power is required?

a)

39 W

b)

41 W

c)

43 W

d)

45 W

54.

45 J of work were done on the object that moved 5 meters. How much force was applied to the object?

a)

8 N

b)

225 N

c)

9 N

d)

0 N

55.

A family needs 10 Newtons of force to lift a box to the top of a 2 meter shelf. How much work do they do? (a)  

Choose from the below words
12 J
8 J
20 J
5 J
56.

What are the units for Work?

a)

Newtons

b)

Kilograms

c)

Joules

d)

Moles

57.

Power is measured in ___________.

a)

meters

b)

joules

c)

newtons

d)

watts

58.

Is this an example of work?

a)

Yes

b)

No

59.

You carry a heavy bag of cat litter home from the pet store.

a)

Work

b)

Not work

60.

Which of the following statements is true about mechanical energy?

a)

Mechanical energy is always conserved in all systems.

b)

Mechanical energy is the sum of kinetic and potential energy.

c)

Mechanical energy only includes kinetic energy.

d)

Mechanical energy only includes potential energy.

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