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MIDTERM QUIZ PHYSICS FOR ENGINEERS

Total questions: 50

Worksheet time: 49mins

Name
Class
Date
1.

A book is lying at rest on a table. The book will remain there at rest because

a)

there is a net force but the book has too much inertia

b)

there are no forces acting on it at all

c)

there is no net force on the book

d)

there is a net force, but the book is too heavy to move

2.

A hockey puck slides on ice at constant velocity. What is the net force acting on the puck?

a)

equal to its weight

b)

zero

c)

less than its weight but more than zero

d)

depends on the speed of the puck

3.
If a force of 26 N is exerted on two balls, one with a mass of 0.52 kg and the other with a mass of 0.78 kg, which ball will have the greater acceleration?  (F=ma)
a)
The one with a mass of .78 kg will have the greatest acceleration.
b)
The one with a mass of .52 kg will have the greatest acceleration.
c)
They will both accelerate at the same rate.
4.
A student pushes a box to right with a force of 10N while a young boy pushes the box to the left with a force of 8N. What is the sum of all forces on the box? 
a)
18N left
b)
18N right
c)
2N right
d)
2N left
5.
Unit of mass
a)
m/s 2
b)
m/s
c)
newtons
d)
kg
6.
Which type of force(s) will cause a change in an object's motion?
a)
gravity
b)
zero net force
c)
balanced forces
d)
unbalanced forces
7.
What is Newton's First Law known as? The Law of
a)
Friction
b)
Mass
c)
Inertia
d)
Gravity
8.

Which law is this picture illustrating?

a)

Law 1

b)

Law 2

c)

Law 3

9.
Which one of Newton’s Laws of Motion best explains why the dishes do not move when the table cloth is removed?
a)
Newton's Law of Inertia
b)
Newton's Law of F=ma
c)
Newton's Law of Force Pairs
d)
Newton's Law of Biology
10.
____ is a force that occurs when an object rubs against another object.
a)
Motion
b)
Friction
c)
Velocity
d)
Speed
11.
Jasmyn can run 50 yards in 10 seconds and Jaylah can run 100 yards in 20 seconds. Who has a faster speed? (speed is distance divided by time; S = d/t)
a)
Jasmyn
b)
Jaylah
c)
Both have the same speed.
12.
Which one needs a greater net force to move, a kilogram of feathers or a kilogram of iron? 
a)
feathers 
b)
iron
c)
same
d)
depends on their friction
13.

You kick a smooth flat stone out on a frozen lake. The stone slides, slows down and eventually stops. You conclude that

a)

no net force acted on the stone

b)

a net force acted on it all along

c)

the stone has a natural tendency to be at rest

d)

the force pushing the stone forward finally stopped pushing on it

14.

Consider a cart on a horizontal frictionless table. Once the cart has been given a push and released, it move with constant velocity. What would have to be done in order to have the cart continue with constant acceleration?

a)

push the cart longer before release

b)

change the mass of the cart

c)

push the cart continuously

d)

push the cart harder before release

15.
Which of Newton's laws are illustrated with a rocket launch?
a)
1st Law, the Law of Inertia. 
b)
2nd Law, the Law of Acceleration.
c)
3rd Law, the Law of Action Reaction
d)
The Law of Conservation of Mass
16.
Object X has twice the mass of Object Y.  Both objects are accelerating at the same rate.  Which statement best describes the motions of Object X and Object Y.
a)
Object X is travelling at twice the speed as Object Y.
b)
Object X is travelling at half the speed as Object Y.
c)
Object X requires twice the force to accelerate at the same rate as Object Y.
d)
Object X requires half the force to accelerate at the same rate as Object Y.
17.
An object at rest will _______ if no outside forces are applied.
a)
Stay at rest
b)
Increase Velocity
c)
Decrease Mass
18.
A greater applied force is required to move an object with a greater mass than one with a smaller mass.
a)
True
b)
False
19.
The SI units for force are...
a)
Kilograms
b)
Newtons
c)
Meters per second
d)
Pounds
20.
If a baseball and a cannonball are dropped from the same height at the same time, which ball will hit the ground first?
a)
the cannonball
b)
the baseball
c)
The balls land at the same time.
d)
the ball with the larger volume
21.
A crumpled piece of paper hits the ground before a flat sheet of paper because
a)
the acceleration of gravity is greater on the  crumpled paper.
b)
there is more air resistance against the flat paper.
c)
the crumpled paper is more massive
d)
the crumpled paper is less massive.
22.
According to Newton’s first law of motion, a moving object that is not acted on by an unbalanced force will
a)
remain in motion.
b)
eventually come to a stop.
c)
change its momentum.
d)
accelerate.
23.
A hiker’s velocity begins at 1.8 m/s uphill and changes to 1.5 m/s uphill. How do you know that the hiker has a negative acceleration?
a)
His direction changed.
b)
His direction was unchanged.
c)
His speed increased.
d)
His speed decreased.
24.
How does Newton’s third law explain how a rocket takes off?
a)
The rocket’s acceleration is positive, while the gasses acceleration is negative but the direction is the same. 
b)
The rocket is at rest until ignition.
c)
The hot gasses move in one direction, while the rocket moves in the opposite direction but with equal force.
25.
Acceleration is caused by a force acting on a mass.
a)
Newton’s first law of motion
b)
Newton’s second law of motion
c)
Newton’s third law of motion
26.
For a force on an object there is an equal and opposite force.
a)
Newton’s first law of motion
b)
Newton’s second law of motion
c)
Newton’s third law of motion
27.
If a force of 26 N is exerted on two balls, one with a mass of 0.52 kg and the other with a mass of 0.78 kg, which ball will have the greater acceleration?  (F=ma)
a)
The one with a mass of .78 kg will have the greatest acceleration.
b)
The one with a mass of .52 kg will have the greatest acceleration.
c)
They will both accelerate at the same rate.
28.
A 20 kg bike accelerates at 10 m/s2.  what was the force?
a)
25 Newtons
b)
20 Newtons
c)
200 Newtons
d)
10 Newtons
29.
Newton's third law states that any action will have a(n) _______ and ______ reaction
a)
Equal and similar
b)
Equal and opposite
c)
Equal and different
d)
Greater and opposite
30.
Which of Newton's laws is illustrated when a magician pulls a tablecloth out from under the dishes without disturbing them?
a)
first
b)
second
c)
third 
d)
fourth
31.

A 10 kg object experiences a net force of 20 Newtons. Calculate the object's acceleration.

a)

2 ms22\ \frac{m}{s^2}  

b)

0.5 ms20.5\ \frac{m}{s^2}  

c)

200 ms2200\ \frac{m}{s^2}  

d)

3.33 ms23.33\ \frac{m}{s^2}  

32.

A box is accelerated to the right across rough ground by a horizontal force Fa. The force of friction is Ff. The weight of the box is Fg and the normal reaction is Fn. Which is the free-body diagram for this situation?

a)
b)
c)
d)
33.

Two blocks of weight 5 N and 2 N are attached to two ropes, X and Y.

The blocks hang vertically. The mass of the ropes is negligible. What is the tension in X and the tension in Y?

a)

7N, 7N

b)

7N, 2N

c)

5N, 2N

d)

5N, 3N

34.

A cart of mass 4.0 kg is being pulled with a force of 24 N. The cart accelerates at 3.0m s–2. An unknown friction force also acts on the cart. What is the net force on the cart?

a)

6.0 N

b)

8.0 N

c)

12 N

d)

24 N

35.

A constant force of 12 N is applied for 3.0 s to a body initially at rest. The final velocity of the body is 6.0m s–1. What is the mass of the body?

a)

1.5 kg

b)

6.0 kg

c)

24 kg

d)

36 kg

36.

A box is pulled by a tension force with an unknown magnitude to the right. The box experiences a constant friction force equal to 20 Newtons. The box has a mass of 10 kg and experiences an acceleration of 5 m/s^2 to the right. What must be the magnitude of the tension force applied to the right?

a)

50 Newtons

b)

70 Newtons

c)

30 Newtons

d)

150 Newtons

37.

An object has a mass of 30 kg and an acceleration of 2 m/s^2. What must be the net force on the object?

a)

60 N

b)

45 N

c)

15 N

d)

0.067 N

38.

A 20 kg bike accelerates at 10 m/s2. What was the force?

a)

30 Newtons

b)

2 Newtons

c)

200 Newtons

d)

10 Newtons

39.

The distance between the Earth and the Moon centres is 3.8 × 108 m. The mass of the Earth is, me= 5.97 × 1024 kg

and the mass of the Moon is, mm = 7.36 × 1022 kg. What is the gravitational force between the Earth and the Moon?

(G = 6.67 × 10-11 N m-2 kg-2)

a)

2.03 x 1021 N

b)

2.03 x 1020 N

c)

4.03 x 1020 N

d)

4.03 x 1022 N

40.

The mass of the Sun is 2.0 × 1030 kg and the mass of the Earth is, me = 5.97 × 1024kg. The distance from the Earth is 1.50 × 1011km. What is the gravitational force between the Sun and the Earth?

(G = 6.67 × 10-11 N m-2 kg-2)

a)

1.54 x 1022 N

b)

2.54 x 1022 N

c)

3.54 x 1022 N

d)

4.54 x 1022 N

41.

A rocket of 2.5 x 104 kg moves from Earth to the moon. The mass of the Earth is me = 5.97 × 1024kg. Calculate the Earth’s gravitational force on the rocket when its distance from the Earth is 1.0 x 109 m. (G = 6.67 × 10-11 N m-2 kg-2)

a)

9.95 N

b)

8.95 N

c)

10.95 N

d)

9.81 N

42.

A 300 kg satellite is orbiting around the Earth at the height of 550 km. Given that the mass of the Earth is 5.97 × 1024kg and the radius of the Earth is 6.37 × 106 m. What is the value of gravitational acceleration at the location of the satellite?

(G = 6.67 × 10-11 N m-2 kg-2)

a)

8.32 ms-2

b)

9.81 ms-2

c)

7.39 ms-2

d)

5.65 ms-2

43.

Newton’s Universal Law of Gravitation states that the gravitational force between two objects is directly proportional to the product of masses of the two objects and inversely proportional to

a)

distance between the two objects.

b)

square of the product of the body’s radii.

c)

square of the distance between the centres of the two objects.

d)

cube of the distance between the centres of the two objects.

44.

If the distance between two particles is doubled, what

happened to the gravitational force between them?

a)

Is reduced to one-fourth of the original value

b)

Is reduced to half of the original value

c)

Becomes double

d)

Becomes four times

45.

If the mass of the Earth becomes four times, what will happen to the value of g?

a)

Double

b)

No effect

c)

Half

d)

Four times

46.

You are talking to your friend who is sitting 1.5 m in front of you. If your mass is 60kg and your friend's mass is 50 kg, what is the gravitational force between you and your friend?

a)

A 6.9 x 10-8 N

b)

B 8.9 x 10-8 N

c)

C 9.5 x 10-8 N

d)

D 1.3 x 10-7 N

47.

Two identical bowling balls attract each other with a gravitational force of

3.0 x 10-9 N. The mass of each of the bowling ball is 6.1 kg. What is the distance between their centres?

a)

A 0.83 m

b)

B 0.91 m

c)

C 1.60 m

d)

D 6.20 m

48.

The mass of Mars is 6.42 x 1023 kg. The acceleration due to gravity on its surface is 3.71 m s-2. What is the radius of Mars?

a)

A 3.4 x 106 m

b)

B 6.4 x 106 m

c)

C 7.8 x 106 m

d)

D 11.5 x 106 m

49.

What is the mass of a planet with a radius of 3.39 x 106 m and a gravitational acceleration of 3.71 m s-2 on its surface?

a)

A 2.7 x 1023 kg

b)

B 3.8 x 1023 kg

c)

C 4.7 x 1023 kg

d)

D 6.4 x 1023 kg

50.

A sphere with mass 100 kg is brought to the top of a mountain of height 6000 m. What is its weight there?

a)

A 960 N

b)

B 975 N

c)

C 980 N

d)

D 981 N

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