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11 Physics Forces and Motion

Total questions: 53

Worksheet time: 4hrs 8mins

Name
Class
Date
1.

What causes an object to move?

a)

When balanced forces act on an object

b)

When unbalanced forces act on an object

c)

When the total force acting on the object equals zero

d)

Both a and c

2.

The SI unit of force is the...

a)

Joule

b)

Meter

c)

Kilogram

d)

Newton

3.

When an unbalanced force acts on an object...

a)

The objects motion does not change

b)

The weight of the object decreases

c)

The object accelerates

d)

The inertia of the object increases

4.

The forces acting on a falling leaf are...

a)

air resistance and fluid friction

b)

gravity and air resistance

c)

gravity and static friction

d)

weight and rolling friction

5.

If a force of 12 N is applied to an object with a mass of 2kg, the object will accelerate at...

a)

0.17 ms2\frac{m}{s^2}

b)

6 ms2\frac{m}{s^2}

c)

24 ms2\frac{m}{s^2}

d)

12 ms2\frac{m}{s^2}

6.

Your weight equals your..

a)

mass

b)

mass divided by the net force acting on you

c)

mass times acceleration due to gravity

d)

mass times your speed

7.

Newton's third law of motion describes

a)

action and reaction forces

b)

centripetal forces

c)

balanced forces

d)

net force

8.

Newton first law of motion is?

a)

Law of attraction

b)

Law of acceleration

c)

Law of inertia

d)

Law and order

9.

For every action force or momentum there is an equal and opposite reaction force or momentum.

a)

Newtons first law states

b)

Newtons second law states

c)

Newtons third law states

d)

All newtons laws if motion state

10.

Define the term Centre of gravity

a)

Force applied through the centre of gravity of an object

b)

The point in space around which an object rotates

c)

A force applied to one side of the centre of gravity

d)

A point on a body at which the earths gravitational pull is concentrated

11.
Suppose you take a trip that covers 180km in 3 hours. Your average speed is...
a)
30km/hr
b)
360km/hr
c)
180 km/hr
d)
60km/hr
12.
When one object is travelling with a constant velocity, its acceleration will be 
a)
decreasing
b)
increasing
c)
constant
d)
zero
13.
What is another name for balanced forces on an object that result in a net force of zero?
a)
gravity
b)
air resistance
c)
equilibrium
d)
friction
14.
A pencil lies on your desk. If the Earth is moving around the sun at a speed of 30km/s, how fast is the pencil moving relative to the desk and relative to the sun?
a)
Desk 0km/s, Sun 0km/s
b)
Desk 0km/s, Sun 30km/s
c)
Desk 30km/s, Sun 0km/s
d)
Desk 30km/s, Sun 30km/s
15.

Which vector below represents the resultant of the two displacement vectors shown?

a)
b)
c)
d)
16.

Which is a vector quantity?

a)

distance

b)

time

c)

mass

d)

velocity

17.

A 3.0-newton force and a 4.0-newton force act concurrently on a point. In which diagram shown would the orientation of these forces produce the greatest net force on the point?

a)
b)
c)
d)
18.

Which pair of graphs represent the same motion?

a)
b)
c)
d)
19.
Suppose a minivan is moving in a straight line and steadily increases it speed. The speed changed from 35km/hr to 40km/hr the first second, 40 to 45 the next second. What is the minivan's acceleration? 
a)
10km/hr/s
b)
35km/hr/s
c)
5km/hr/s
d)
40km/hr/s
20.
A freely falling object starts from rest, after falling for 15s it will have a speed of about...
a)
750m/s
b)
15m/s
c)
150m/s
d)
75m/s
21.
If you drop a feather and a coin at the same time in a vacuum tube, which will reach the bottom of the tube first?
a)
the coin
b)
the feather
c)
neither, they will both hit at the same time
d)
it depends on the length of the tube
22.
A ball is thrown straight up. At the top of the path the acceleration is...
a)
about 10m/s2
b)
0m/s2
c)
20m/s2
d)
dependent on how long it ha been in the air. 
23.
Why is it harder for the boy in Image B to get down the hill?
a)
Motion
b)
Friction
c)
Work
d)
Displacement
24.
If these boys are pulling with the same amount of force.  What will happen?
a)
The boy in blue will win.
b)
They will not move at all.
c)
The boy in red will win.
d)
Both will fall down.
25.
It takes more force to accelerate the iron man on the left than the iron man on the right because the iron man on the left has more mass. This best describes
a)
Newton's first law, the law of inertia
b)
Newton's second law, the law of acceleration
c)
Newton's third law, the law of action reaction 
d)
The law of universal gravitation
26.
For every action, there is an equal and opposite reaction.
a)
Newton's
1st
Law of Motion
b)
Newton's
2nd
Law of Motion
c)
Newton's
3rd
Law of Motion
27.

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

28.
  A basketball with a mass of 0.60 kg is accelerated with a force of 10.8 N.  If resisting forces are ignored, what is the acceleration of the basketball to the nearest m/s2?
a)
0.06 N
b)
6.48 m/s2
c)
18 N
d)
18 m/s2
29.
During which interval is the object traveling at a constant velocity?
a)
B to C
b)
D to E
c)
F to G
d)
it traveling at a constant velocity during all of the intervals shown.
30.
This is a velocity-time graph.  What is the object doing in segment A?
a)
Positive acceleration
b)
Negative acceleration
c)
Constant Velocity
d)
Not moving
31.
How far will a car move in 5 seconds if it started from rest and accelerates uniformly at 2.5 ms-2?
a)
12.5 m
b)
125 m
c)
6.25 m
d)
31.25 m
32.

A dog basks in the sun when he sees a squirrel and bolts after it. If the dog accelerates at +1.6 m/s2, how far does he run in 3 seconds?

a)

4.8 meters

b)

45 meters

c)

1.6 meters

d)

7.2 meters

33.

An airplane accelerates down a runway at 4 m/s2 for 24 s until is finally lifts off the ground. Determine the distance traveled before takeoff?

a)

1152m

b)

2304m

c)

48m

d)

1000m

34.
A car is traveling at 21.0 m/s. It slows to a stop at a constant rate over 5.00 s. How far does the car travel during those 5.00 seconds before it stops? 
a)
4.20 m
b)
52.5 m
c)
105 m
d)
158 m
35.
A dog runs with an initial speed of 7.5 m/s to a stop in 15 seconds.  What is the dog's acceleration?
a)
-7.5 m/s
b)
-7.5 m/s2
c)
-0.5 m/s2
d)
7.5 mi//hr
36.

An airplane accelerates down a runway at 3.20 m/s2 for 32.8 s until is finally lifts off the ground. Determine the distance traveled before takeoff.

Which equation is appropriate?

a)

vf=vi+at

b)

Δx=vit+1/2at2

c)

vf2=vi2+2aΔX

d)

Δx=((vf+vi)/2)t

37.
A drag racer accelerated from 0 m/s to 200 m/s in 5 s.  What was the acceleration?
a)
0 m/s
b)
40 m/s2
c)
-40 m/s2
d)
40 m/s
38.

The speedometer on your car measures___.

a)

average speed.

b)

average velocity.

c)

instantaneous speed.

d)

instantaneous velocity.

39.

Find the resultant of a vector whose component vectors are +5.50 m vertically and +9.50 m horizontally. Use an order-of-magnitude estimation to choose the correct answer.

a)

11 m

b)

3.87 m

c)

15 m

d)

4 m

40.

A physical quantity that has both a _____ and a ______ associated with it is called vector quantity.

(a)  

41.

Which of the following are not vector quantity?

a)

acceleration

b)

speed

c)

displacement

d)

velocity

e)

total distance

42.
In practice A of the figure, What is  the magnitude of the  resultant displacement?
a)
5 km 
b)
8 km
c)
11 km
d)
15 km
43.

Which of Newton's laws is shown

a)

1st law

b)

3rd law

c)

2nd law

44.

Provide an example of Newton's 1st Law

4 lines
45.

Provide an example of Newton's 2nd Law

4 lines
46.

Provide an example of Newton's 3rd Law

4 lines
47.

The more mass an object has, the _______ force it takes to accelerate it.

a)

more

b)

less

48.

This is one of Taylor's cats. What is her name?

a)

Olivia Benson

b)

Meredith Grey

c)

Moke

d)

Kitty Purry

49.

C'est un fruit jaune qui ne coûte pas cher.

(a)  

50.

According to the graph, which quantity related to the motion of the body is constant?

a)

acceleration

b)

displacement

c)

velocity

d)

speed

51.

The displacement-time graph represents the motion of a cart along a straight line. During which interval was the cart accelerating?

a)

CD

b)

DE

c)

AB

d)

BC

52.

At what point is vy= 0 m/s?

a)

A

b)

B

c)

C

d)

D

e)

None of these points

53.

Suppose Lemming A runs off the edge of the cliff at 2 m/s and Lemming B runs off the edge at 1 m/s. Which will hit the ground first?

a)

A

b)

B

c)

Both at the same time

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