Which of the following is a calculation of work?

Work (j) = Forece (N) x distance (m)

Work (j) = Forece (N) / distance (m)

Work (N) = Forece (j) x distance (m)

Work (N) = Mass (kg) x Gravity x Height (m)

In the image above, what hand does more work.

A & B are equal and are greater than C

No work is done using these three forces.

Power is measure in _______, because the man who invented the steam engine was named ______ _____. Power (P) is equal to ______ ______ by ______.

watts; James Watts; work; divided; time

joules; James Joule; mass; multiplied; distance

newtons; Isaac Newton; time; multiplied; distance

newtons; Isaac Newton; mass; divided; distance

kilograms; Ken Kilo; work; divided; time

In a machine, the ______ ______ in newtons, or the force that the machine applies to what you are trying to move, divided by the _____ _____ in newtons, or the force you apply to the machine, is known as the ______ ______ of the machine.

output force; input force; mechanical advantage

input force; output force; work done

input force; output force; power used

output force; input force; work done

output force; input force; power used

Physics Midterm Exam Review Quiz

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Quizzes Created: 1 | Total Attempts: 211

Questions: 18 | Attempts: 211 | Updated: Mar 21, 2023

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A quiz to help review for the midterm exam.

Questions and Answers

1.

Which of the following is a calculation of work?
- A.
  
  Work (j) = Forece (N) x distance (m)
- B.
  
  Work (j) = Forece (N) / distance (m)
- C.
  
  Work (N) = Forece (j) x distance (m)
- D.
  
  Work (N) = Mass (kg) x Gravity x Height (m)
- E.
  
  Both 'A' and 'D' are correct.
Correct Answer
E. Both 'A' and 'D' are correct.

Explanation
Answer A will provide work while not going against gravity, say sliding a book on a table.
Answer B will provide work while going against gravity, like sliding a book up a ramp.

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2.

In the image above, what hand does more work.
- A.
  
  A
- B.
  
  B
- C.
  
  C
- D.
  
  A & B are equal and are greater than C
- E.
  
  No work is done using these three forces.
Correct Answer
C. C

Explanation
Force C will do the most work because it is entirely in the direction of the motion.

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3.

Alexander has a mass of 70 kilograms. HIs apartment is on the second floor, 5 meters up from ground level. How much work does he do against gravity each time e clims the stairs to his apartment?
- A.
  
  70N
- B.
  
  9.8N
- C.
  
  5m
- D.
  
  686N
- E.
  
  None of the above
Correct Answer
D. 686N

Explanation
W=FD
W=70kg x 9.8m/s/s
W=686N

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4.

Power is measure in _______, because the man who invented the steam engine was named ______ _____. Power (P) is equal to ______ ______ by ______.
- A.
  
  Joules; James Joule; mass; multiplied; distance
- B.
  
  Newtons; Isaac Newton; time; multiplied; distance
- C.
  
  Newtons; Isaac Newton; mass; divided; distance
- D.
  
  Kilograms; Ken Kilo; work; divided; time
- E.
  
  Watts; James Watts; work; divided; time
Correct Answer
E. Watts; James Watts; work; divided; time

Explanation
Answer E is the only choice that correctly fills in all of the blanks.
Choice D is wrong because of the measurement of power and because of the name of the inventor.

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5.

What is a device with moving parts that work together to accomplish a task?
- A.
  
  Gear
- B.
  
  Pulley
- C.
  
  Machine
- D.
  
  Wheel and axel
- E.
  
  Lever
Correct Answer
C. Machine

Explanation
Answer C is the only option that applies here. Answers A, B, D, and E are all example of C.

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1
0
6.

In a machine, the ______ ______ in newtons, or the force that the machine applies to what you are trying to move, divided by the _____ _____ in newtons, or the force you apply to the machine, is known as the ______ ______ of the machine.
- A.
  
  Input force; output force; work done
- B.
  
  Input force; output force; power used
- C.
  
  Output force; input force; work done
- D.
  
  Output force; input force; power used
- E.
  
  Output force; input force; mechanical advantage
Correct Answer
E. Output force; input force; mechanical advantage

Explanation
Answers A & B are incorrect because of the order of forces (both list input then output, but the question calls for output then input). All choices that list work done or power used are incorrect because of these words. This leaves choice C as the only correct answer.

NOTE THAT THIS DOES NOT APPLY TO LEVERS OR GEARS OR RAMPS

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7.

The _____ _____ of a machine can never be _____ than the ______ ______. When you design a machine that multiplies force, you pay by having to apply the force over a ______ distance.

Correct Answer
distance, greater, input, output, work, work, force, force, initial, final, greater

Explanation
The output work of a machine can never be greater than the input work. When you design a machine that multiplies force, you pay by having to apply the force over a greater distance.

Nature does not give something for nothing. You cannot get more than what you have.

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4
8.

How do you find the mechanical advantage of a lever? Remember to include units in your answer.
9.

Describe the three classes of levers. Include the location of the fulcrum and the amount of force that is input and output for each class.
10.

The force in a rope is called the ____.

Correct Answer
mechanical advantage, output work, force, tension, height, teeth

Explanation
The answer is tension.

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4
11.

How do you fid the gear ratio?
12.

How do you find the mechanical advantage of a ramp?
13.

How do you find the mechanical advantage of a screw?
14.

When we measure how close to perfect a machine is, we are measuring its _____.

Correct Answer
length, complexity, friction, mechanical advantage, electricity, efficiency, type, class, joule

Explanation
Efficiency is how close to perfect a machine is.

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4
15.

Efficiency is measured in percentages. Why is no machine 100% efficient? Copy the text below (including the dashes), paste it into your answer and then use one word.Some energy is lost to ________ in all machines.--
16.

Any process that is not 100% efficient is ___________

Correct Answer
impossible, irreversible, reversible

Explanation
Because some energy cannot get back into potential or kinetic energy, any process with less than 100% efficiency is irreversible.

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4
17.

The efficiency is less than 100% for virtually all process that do what?
18.

A simple machine has a mechanical advantage of 5. If the output force is 10N, what is the input force?

Physics Midterm Exam Review Quiz

Which of the following is a calculation of work?

In the image above, what hand does more work.

Alexander has a mass of 70 kilograms. HIs apartment is on the second floor, 5 meters up from ground level. How much work does he do against gravity each time e clims the stairs to his apartment?

Power is measure in ___, because the man who invented the steam engine was named _. Power (P) is equal to by ____.

What is a device with moving parts that work together to accomplish a task?

In a machine, the __ in newtons, or the force that the machine applies to what you are trying to move, divided by the _ _ in newtons, or the force you apply to the machine, is known as the __ of the machine.

The ___ _ of a machine can never be _ than the . When you design a machine that multiplies force, you pay by having to apply the force over a ____ distance.

How do you find the mechanical advantage of a lever? Remember to include units in your answer.

Describe the three classes of levers. Include the location of the fulcrum and the amount of force that is input and output for each class.

The force in a rope is called the ____.

How do you fid the gear ratio?

How do you find the mechanical advantage of a ramp?

How do you find the mechanical advantage of a screw?

When we measure how close to perfect a machine is, we are measuring its _____.

Efficiency is measured in percentages. Why is no machine 100% efficient? Copy the text below (including the dashes), paste it into your answer and then use one word.Some energy is lost to ________ in all machines.--

Any process that is not 100% efficient is ___________

The efficiency is less than 100% for virtually all process that do what?

A simple machine has a mechanical advantage of 5. If the output force is 10N, what is the input force?

Physics Midterm Exam Review Quiz

Which of the following is a calculation of work?

In the image above, what hand does more work.

Alexander has a mass of 70 kilograms. HIs apartment is on the second floor, 5 meters up from ground level. How much work does he do against gravity each time e clims the stairs to his apartment?

Power is measure in _______, because the man who invented the steam engine was named ______ _____. Power (P) is equal to ______ ______ by ______.

What is a device with moving parts that work together to accomplish a task?

In a machine, the ______ ______ in newtons, or the force that the machine applies to what you are trying to move, divided by the _____ _____ in newtons, or the force you apply to the machine, is known as the ______ ______ of the machine.

The _____ _____ of a machine can never be _____ than the ______ ______. When you design a machine that multiplies force, you pay by having to apply the force over a ______ distance.

How do you find the mechanical advantage of a lever? Remember to include units in your answer.

Describe the three classes of levers. Include the location of the fulcrum and the amount of force that is input and output for each class.

The force in a rope is called the ____.

How do you fid the gear ratio?

How do you find the mechanical advantage of a ramp?

How do you find the mechanical advantage of a screw?

When we measure how close to perfect a machine is, we are measuring its _____.

Efficiency is measured in percentages. Why is no machine 100% efficient? Copy the text below (including the dashes), paste it into your answer and then use one word.Some energy is lost to ________ in all machines.--

Any process that is not 100% efficient is ___________

The efficiency is less than 100% for virtually all process that do what?

A simple machine has a mechanical advantage of 5. If the output force is 10N, what is the input force?

Power is measure in ___, because the man who invented the steam engine was named _. Power (P) is equal to by ____.

In a machine, the __ in newtons, or the force that the machine applies to what you are trying to move, divided by the _ _ in newtons, or the force you apply to the machine, is known as the __ of the machine.

The ___ _ of a machine can never be _ than the . When you design a machine that multiplies force, you pay by having to apply the force over a ____ distance.