Newton

1
Newtons Laws

• Forces and Motion

2
A force that is applied by gravity to an object

1. Normal Force
2. Weight
3. Natural Force
4. Friction
5. Tension
6. None of These

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3
Any force applied to an object by a surface

• Tension
• Natural Force
• Weight
• Normal force
• Balanced force
• None of These

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4
A force that is applied to an object through a
string, rope, or chain is called

1. Friction
2. Natural Force
3. Normal Force
4. Net Force
5. Tension
6. None of these

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5
A force that resists the motion of an object is
called

1. Natural force
2. Friction
3. Weight
4. Normal Force
5. Applied Force
6. None of these

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6
Which direction does weight act?

1. To the right
2. To the left
3. North
4. South
5. Up
6. Down
7. At some angle to the horizontal

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7
What direction does the friction force act?

1. Perpendicular to the surface in the same
   direction as the motion.
2. Parallel to the surface in the same direction as
   the motion.
3. Perpendicular to the surface in the opposite
   direction of the motion.
4. Parallel to the surface in the opposite direction
   of the motion.
5. At some angle to the surface not related to the
   motion.

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8
What direction does the Normal force act?

1. Perpendicular to the surface pointing toward the
   surface.
2. Perpendicular to the surface pointing away from
   the surface.
3. Parallel to the surface pointing in the direction
   of motion.
4. Parallel to the surface pointing opposite the
   direction of motion.
5. At some angle to the surface unrelated to the
   motion.

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9
Net force can be calculated which of the
following ways. (Choose all that apply.)

1. Adding all of the force magnitudes together
2. Adding all of the force vectors together
3. Multiplying mass times acceleration
4. Multiplying mass times velocity
5. Dividing mass by acceleration
6. Dividing mass by velocity

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10
Friction depends on what factors? Choose all
that apply.

1. Weight
2. Normal force
3. Applied force
4. Surface textures
5. Surface Area
6. None of these

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11
Newtons 1st Law is best summarized as

1. Action-Reaction
2. Unbalanced Forces
3. Inertia
4. Gravity
5. None of these

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12
Newtons 3rd Law can be best summarized as

1. Action-Reaction
2. Unbalanced Forces
3. Inertia
4. Gravity
5. None of these

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13
What quantity ties forces acting on an object and
the motion of the object together?

1. Velocity
2. Net force
3. Normal force
4. Mass
5. Acceleration

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14
What happens to the acceleration of a given
object if the Net Force acting on it is doubled?

1. Stays the same
2. Double the original
3. Quadruple the original
4. Becomes half of the original
5. Becomes one-quarter of the original

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15
What happens to the acceleration if the Force
remains constant and the mass is doubled?

1. Stays the same
2. Double the original
3. Quadruple the original
4. Becomes half of the original
5. Becomes one-quarter of the original

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16
If Action-Reaction force pairs are equal and
opposite, are they balanced forces?

• Yes, they cancel each other out
• No, because they are acting on different objects
• The answer depends on the specific problem

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17
An object has a mass of 65 grams on Earth. How
much mass does it have on the moon? (g1.6 m/s2)

1. 0.104 g
2. 0.638 g
3. 6.63 g
4. 40.6 g
5. 65 g
6. 104 g
7. 638 g

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18
An object has a mass of 65 grams on Earth. How
much does it weigh?

1. 0.104 N
2. 0.638 N
3. 6.63 N
4. 40.6 N
5. 65 N
6. 104 N
7. 638 N

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19
An object has a mass of 65 grams on Earth. How
much does it weigh on the moon? (g1.6 m/s2)

1. 0.104 N
2. 0.638 N
3. 6.63 N
4. 40.6 N
5. 65 N
6. 104 N
7. 638 N

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20
Which statements below are true if an object is
said to be in equilibrium? (Choose all that
apply)

1. All of the horizontal forces are balanced
2. All of the vertical forces are balanced
3. Horizontal forces are balanced, but vertical
   forces are not balanced
4. Vertical forces are balanced, but horizontal
   forces are not balanced
5. Net Force is zero
6. None of these are true statements

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21
A 6 kg bowling ball is given an acceleration of 2
m/s2. How much force was required?

1. 2 N
2. 3 N
3. 6 N
4. 9.81 N
5. 12 N
6. None of these

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22
A large dog weighs 400 N. What is the mass of
the dog?

1. 9.81 kg
2. 40.77 kg
3. 400 kg
4. 3924 kg
5. None of these

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23
What is the Net Force on a 20N stone if you apply
an upward force of 27 N on it?

1. 0 N
2. 7 N, up
3. 7 N, down
4. 20 N, up
5. 20 N, down
6. 27 N, up
7. 27 N, down
8. 47 N, up
9. 47 N, down
10. None of these

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24
What is the acceleration on a 20N stone if you
apply an upward force of 27 N on it?

1. 0 m/s2
2. 2.04 m/s2
3. 2.54 m/s2
4. 2.75 m/s2
5. 3.43 m/s2
6. None of these

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25
A race car with a mass of 1000 kg starts from
rest and travels 60 m in 4 second. What Net
Force is applied to the car?

1. 0 N
2. 7.5 N
3. 133 N
4. 7500 N
5. None of these

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26
A 15 kg crate is pushed across a level floor by
an applied force of 100 N. If the coefficient of
friction between the crate and the floor is 0.35,
what is the normal force acting on the crate?

1. 0 N
2. 1.5 N
3. 35 N
4. 51.5 N
5. 147 N
6. None of these

15 kg
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27
A 15 kg crate is pushed across a level floor by
an applied force of 100 N. If the coefficient of
friction between the crate and the floor is 0.35,
what is the force of friction acting on the
crate?

1. 0 N
2. 15 N
3. 35 N
4. 51.5 N
5. 147 N
6. None of these

15 kg
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28
A 15 kg crate is pushed across a level floor by
an applied force of 100 N. If the coefficient of
friction between the crate and the floor is 0.35,
what is the vertical net force acting on the
crate?

1. 0 N
2. 35 N
3. 48.5 N
4. 51.5 N
5. 147 N

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29
A 15 kg crate is pushed across a level floor by
an applied force of 100 N. If the coefficient of
friction between the crate and the floor is 0.35,
what is the horizontal net force acting on the
crate?

1. 0 N
2. 35 N
3. 48.5 N
4. 51.5 N
5. 147 N

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30
A 15 kg crate is pushed across a level floor by
an applied force of 100 N. If the coefficient of
friction between the crate and the floor is 0.35,
what is the acceleration on the crate?

1. 0 m/s2
2. 0.33 m/s2
3. 3.23 m/s2
4. 3.43 m/s2
5. 9.81 m/s2

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