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9-29 Newton's Laws Mixed Practice

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Last updated about 3 years ago
38 questions
Note from the author:
F=ma Fwt = mg g=9.8m/s2

m=F/a

a=F/m
F=ma Fwt = mg g=9.8m/s2

m=F/a

a=F/m
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Force & Weight

Weight (W) is the measure of gravity’s pull on an object. To calculate weight, you multiply mass (kg)
by gravity (m/s2). Recall that 1 kg x 1 m/s2 = 1 kgm/s2 = 1 Newton (N). So, W = Fg = mg. After solving
for the mass, you can then work with Newton’s 2nd Law (ΣF=ma). Answer these questions.
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Question 1
1.

What net force is required to accelerate a car at a rate of 2 m/s2 if the car has a mass of 3,000 kg?

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Free-body diagrams for four situations are shown below. For each situation, determine the net force acting upon the object. Be sure to give the magnitude, unit, and direction of the net force. If no net force is present, just answer "balanced.

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Free-body diagrams for four situations are shown below. The net force is known for each situation. However, the magnitudes of a few of the individual forces are not known. Analyze each situation individually and determine the magnitude of the unknown forces.

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Question 17
17.

What is the magnitude of Force A?

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The object is moving up the ramp.

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Question 27
27.

As an astronaut travels to Jupiter (higher acceleration due to gravity) their mass ____ and their weight ____

Question 28
28.

Which law states that every action has an equal and opposite reaction?

Question 29
29.

Which law states that every action has an equal and opposite reaction?

Question 30
30.

Which law explains why a smaller child will move faster if pushed on ice skates compared to a larger adult?

Question 31
31.

If a bucket of Mickey Popcorn is loose on the monorail, what direction will it go as the monorail accelerates forward?

Question 32
32.

If a bucket of Mickey Popcorn is loose on the monorail, what direction will it go as the monorail makes an abrupt left turn?

Question 33
33.

Which force would be responsible for a deceleration as an object slides across a surface?

Question 34
34.

Watch this video: https://www.youtube.com/watch?v=2k-2IlJcaHg
If you are riding the Tower of Terror (large elevator ride), what can be said about the forces on you as the elevator rockets up?

Question 35
35.

Watch this video: https://www.youtube.com/watch?v=2k-2IlJcaHg
If you are riding the Tower of Terror (large elevator ride), what can be said about the forces on you as the elevator rockets up?
Draw the Free Body Diagram for the scenario

Drawing Free Body Diagrams: Label all forces acting in these scenarios
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Question 36
36.

A book is at rest on the table

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Question 37
37.

A wagon is pulled by a rope to the left across a level surface

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Question 38
38.

A couch is being pushed to the right up a ramp.

Question 2
2.

A 10 kg bowling ball would require what force to accelerate down an alleyway at a rate of 3 m/s2?

Question 3
3.

What is the mass of a falling rock if it produces a force of 147 N?

Question 4
4.

What is the mass of a truck if it produces a force of 14,000 N while accelerating at a rate of 5 m/s2?

Question 5
5.

What is the acceleration of softball if it has a mass of 0.5 kg and hits the catcher's glove with a force of 25 N?

Question 6
6.

Sally has a car that accelerates at 5 m/s2. If the car has a mass of 1000 kg, how much force does the car produce?

Question 7
7.

What is the net force for Situation A?

Question 8
8.

What is the net force for Situation C?

Question 9
9.

What is the net force for Situation B?

Question 10
10.

What is the net force for Situation D?

Question 11
11.

What can you say about the motion for Situation A?

Question 12
12.

What can you say about the motion for Situation B?

Question 13
13.

What can you say about the motion for Situation C?

Question 14
14.

What can you say about the motion for Situation D?

Question 15
15.

What is the Weight of the object in Situation C?

Question 16
16.

What is the mass of the object in Situation C?

Question 18
18.

What is the magnitude of Force C?

Question 19
19.

What is the magnitude of Force D?

Question 20
20.

What is the magnitude of Force E?

Question 21
21.

What is the magnitude of Force G?

Question 22
22.

If force F has a value of 100 N, what is force H's value?

Question 23
23.

Which is the applied force?

Question 24
24.

Which is the weight?

Question 25
25.

Which is the normal force?

Question 26
26.

Which is the frictional force?