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Forces and Momentum

Total questions: 16

Worksheet time: 22mins

Name
Class
Date
1.
The force of gravity acting on an object is the object's ______.
a)
mass
b)
matter
c)
weight 
d)
friction 
2.
What is the net force?
a)
5.5 N left
b)
5.5 N right
c)
2.5 N left
d)
2.5 N right
3.

Using the gravity of earth at 9.81 m/s2 , how much does a person with a mass of 35 kg weigh in Newton's?

a)

0.28 N

b)

343 N

c)

3.57 N

d)

212 N

4.

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

5.

If an object was accelerating at 10 m/s2, and a force of 35 newtons was required to accelerate it, what was the object's mass?

a)

3.5 kilogram

b)

350 kilograms

c)

0.35 kilograms

d)

35 kilograms

6.

Which of the following is the formula for momentum?

a)

p = mv

b)

M = mv

c)

F = ma

d)

g = mc2

7.

Which of the following is the unit for momentum?

a)

kg·m/s

b)

kg·m

c)

kg·m/s2

d)

Momentum has no unit.

8.

Which statement about the diagram is accurate?

a)

The forces pointing up and down are unbalanced.

b)

The forces pointing up and down are balanced.

c)

The forces pointing right and left are balanced.

d)

There is a net force of 200 N to the left.

9.

When an object moves, stops moving, changes speed, or changes direction, how do scientists describe that condition?

a)

stable factors

b)

frictional force

c)

a balanced set of forces

d)

unbalanced forces

10.

Which statement is true because of Newton's second law? F = ma.

a)

When the net force on an object increases, the object's acceleration decreases.

b)

When the net force on an object decreases, the object's acceleration decreases.

c)

When the net force on an object decreases, the acceleration doesn't change.

d)

When the net force on an object decreases, the object's acceleration increases.

11.
A person sits on a freely spinning lab stool that has no friction in its axle. When this person extends her arms,
a)
her moment of inertia increases and her angular speed decreases.
b)
her moment of inertia decreases and her angular speed increases.
c)
her moment of inertia increases and her angular speed increases.
d)
her moment of inertia increases and her angular speed remains the same.
12.
A merry-go-round spins freely when Diego moves quickly to the center along a radius of the merry-go-round. As he does this, it is true to say that
a)
the moment of inertia of the system increases and the angular speed increases.
b)
the moment of inertia of the system decreases and the angular speed remains the same.
c)
the moment of inertia of the system decreases and the angular speed decreases.
d)
the moment of inertia of the system decreases and the angular speed increases.
13.

Which of the following statements are true about force?

a)

the PUSH or PULL on an object

b)

The MOTION an object creates

c)

Going REALLY FAST

d)

Friction is a type of force

14.
Which two forces are equal?
a)
The Force of Gravity and the Normal Force
b)
The applied force and the Force of friction
c)
None
d)
The Force of Gravity and the  Motion Force
15.
What force holds the planets in motion around the sun?
a)
Magnetic
b)
Electrical
c)
Gravitational
d)
Air Resistance
16.
What does the strength of gravity between two objects depend upon?
a)
Mass & distance
b)
Mass & weight
c)
Gravity & inertia
d)
Inertia & mass