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Ch. 2.3 Unbalanced Forces and Motion Test

Total questions: 18

Worksheet time: 9mins

Name
Class
Date
1.

When one object exerts a force on a second object, the second object exerts an equal force in the opposite direction on the first object is Newton's

a)

First Law of Motion

b)

Second Law of Motion

c)

Third Law of Motion

d)

Fourth Law of Motion

2.

The acceleration of an object equals the net force divided by the object's mass is Newton's

a)

First Law of Motion

b)

Second Law of Motion

c)

Third Law of Motion

d)

Fourth Law of Motion

3.

In a circular motion, a force that acts perpendicular to the direction of motion toward the center of the circle is

a)

net force

b)

gravitational force

c)

mass

d)

centripetal force

4.

When a resting object is acted on by an unbalanced force, the object will ___________ in the direction of the unbalanced force.

a)

accelerate

b)

decelerate

c)
move in a circular path
d)
remain stationary
5.

An object's speed will __________ when a net force acts in the same direction as the object's motion.

a)

oscillate

b)

increase (speed up)

c)
remain constant
d)
decrease
6.

An object's speed will __________ when a net force acts in the opposite direction of the object's motion.

a)
increase
b)
remain the same
c)
decrease
d)
oscillate
7.

A ball tied to a string and swung in a circle is an example of a/an ______________.

a)
linear motion
b)
uniform circular motion
c)
oscillatory motion
d)
random motion
8.

In Newton's Second Law of Motion

a)

a= s/f

b)

a=F/m

c)

F=m/a

d)

a=Fm2

9.

In Newton's Second Law of Motion, acceleration is measured in

a)

meters/second2 (m/s2)

b)

meters/second (m/s)

c)

inches/second (in./s)

d)

kilometers/second2 (km/s2)

10.

Force is measured in

a)

Inches

b)

meters

c)

kilograms

d)

Newtons

11.

Mass in Newton's Second Law of Motion is measured in

a)
newtons (N)
b)
kilograms (kg)
c)
pounds (lb)
d)
grams (g)
12.

When the net force is not zero, the velocity of the object ____________.

a)
remain constant
b)
decrease
c)
changes
d)
increase steadily
13.

According to the Second Law of Motion, the unbalanced/gravitational force acting on the Earth and the planets exerted by the Sun is called

a)
electromagnetic force
b)
centrifugal force
c)

centripetal force

d)
frictional force
14.

The forces two objects exert on each other are called

a)

force doubles

b)

force pairs

15.

For every action force there is a _________ force that is equal in size, but __________ in direction.

a)
reaction; opposite
b)
force; similar
c)
push; forward
d)
pull; downward
16.

Solve for acceleration. You throw a 0.5kg basketball with a force of 20N. What is the ball's acceleration? (Use: a=F/m)

a)

a=10m/s2

b)

a=20m/s2

c)

30m/s2

d)

40m/s2

17.

Calculate the acceleration of a 60kg sprinter if the force on the sprinter is 120N. (Use: a= F/m).

a)

a= 1m/s2

b)

a= 2m/s2

c)

a= 10m/s2

d)

a= 20m/s2

18.

A car has a mass of 1500 kg and an acceleration of 2.0m/s2. What is the net force acting on the car?

(Use: F= ma)

a)

1000N

b)

2000N

c)

3000N

d)

4000N