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Practice for final exam. Ch4, Lesson1: Forces and motion

Total questions: 21

Worksheet time: 21mins

Name
Class
Date
1.
According to __________, the acceleration of an object is equal to the net force acting on the object divided by the object's mass. 
a)
Newton's Second Law
b)
Newton's Third Law
c)
Newton's First Law
2.
How much force is needed to accelerate a 3kg skateboard at 5m/s2?
a)
8N
b)
1.6N
c)
0.6N
d)
15N
3.

What Unit do we Measure Force in?

a)

Newtons

b)

Joules

c)

Force

d)

Kilograms

4.
If a 10 kilogram object accelerates suddenly at 15 m/s^2, how much force was applied to the object?
a)
150 Newtons
b)
15 Newtons
c)
150 kilograms
d)
100 kilograms
5.
A car is 2000kg and accelerating at 20m/s2, what is the net force applied to it?
a)
40000 N
b)
100 N
c)
5 N
d)
200 N
6.
A force of 90N is applied to each cart below, which one will accelerate the fastest?
a)
Cart 1
b)
Cart 2
c)
Cart 3 
d)
Cart 4
7.

Chose all that apply:

For the relationship
F=ma\overrightarrow{F}=m\cdot\overrightarrow{a}  

a)

Force is directly proportional to acceleration

b)

Force is inversely proportional to acceleration

c)

Mass is directly proportional to acceleration

d)

Mass is inversely proportional to acceleration

8.

A ball has an acceleration of 8 m/s2. If the force is tripled, the ball's new acceleration will be:

a)

24 m/s2

b)

11 m/s2

c)

unchanged

d)

2.67 m/s2

9.

An object A is moving with an acceleration of 6 m/s2. If the same force is affected on an object B with a mass equal one-third of the first object, what is the acceleration of object B will be :

a)

3 m/s2

b)

2 m/s2

c)

18 m/s2

d)

9 m/s2

10.

Which of the following is classified as field forces?

a)

The force exerted on the earth by the moon

b)

the force exerted from the player to throw a ball

c)

the force a chilled exerts to pull a table

d)

the force of air resistance on a falling object

11.

The graph represents the effects of the applied force on the object with the acceleration gained use the graph to find the mass of the object

a)

3.0 kg

b)

6.8kg

c)

0.67kg

d)

1.5kg

12.

The Figure represents the forces affected on the box . If the box accelerated by 1.6m/s2 , Calculate the mass of the box?

a)

1kg

b)

0.1kg

c)

10kg

d)

25.6kg

13.

Which forces must be equal to make the box moves with constant speed

a)

F1 = F3

b)

F2 = F1

c)

F1 = F4

d)

F4 = F3

14.
a)

A

b)

B

c)

C

d)

D

15.

What is the net force affected on the car shown in the picture to move with a constant speed

a)

b)

c)

d)

16.

What is the net force affected on the box?

a)

0.75 N

b)

0.33 N

c)

2N

d)

3N

17.

What is the mass of the cart?

a)

0.4 kg

b)

2.5 kg

c)

7.0 kg

d)

10 kg

e)

3kg

18.

Which box will move with the least acceleration?

a)

A

b)

B

c)

C

d)

D

19.

In the picture below which force is the force of the floor on the closet?

a)

A

b)

B

c)

C

d)

D

20.

If the mass of the closet shown in the picture is 80kg. how much the force from the floor on the closet?

a)

0 N

b)

80 N

c)

784 N

d)

-784N

21.
a)

b)

c)

d)