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Home  arrow Chapter 6  arrow Practice Questions

Practice Questions



This activity contains 25 questions.

Question 1.
Two men, Joel and Jerry, push against a wall. Jerry stops after 10 min, while Joel is able to push for 5 min longer. Compare the work against the wall they each do.


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Question 2.
Which of the following graphs illustrates Hooke's Law (the spring force)?


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Question 3.
A simple pendulum, consisting of a mass m and a string, swings upward, making an angle θ with the vertical. The work done by the tension force is


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Question 4.

What is the mass of the pendulum 'bob' in the figure?


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Question 5.

What is the total mechanical energy, ME, of the pendulum?


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Question 6.

What is the maximum kinetic energy of the pendulum?


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Question 7.

What is the potential energy, PE, at Point B and D?


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Question 8.

At Point B and D what is the relationship between the kinetic energy, KE and the potential energy, PE?


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Question 9.

What is the speed of the pendulum at Point B and D?


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Question 10.

What is the speed of the pendulum at Point C?


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Question 11.
A simple pendulum, consisting of a mass m, is attached to the end of a 1.5 m length of string. If the mass is held out horizontally, and then released from rest, its speed at the bottom is


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Question 12.

A 4-kg mass moving with speed 2 m/s, and a 2-kg mass moving with a speed of 4 m/s, are gliding over a horizontal frictionless surface. Both objects encounter the same horizontal force, which directly opposes their motion, and are brought to rest by it. Which statement best describes their respective stopping distances?

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Question 13.
A 4-kg mass moving with speed 2 m/s and, an otherwise identical, 2-kg mass moving with a speed of 4 m/s, are gliding over a horizontal surface with friction and are brought to rest by it. Which statement best describes their respective stopping distances?


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Question 14.

A force that Object A exerts on Object B is observed over a 10-second interval, as shown on the graph. How much work did Object A do during that 10 s?


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Question 15.

A force that Object A exerts on Object B is observed over a 10-second interval, as shown on the graph. What is the average power output of A into B?


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Question 16.

The resultant force you exert on a shopping cart, for a 10 s period, is plotted on the graph shown. How much work did you do during this 10 s interval?


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Question 17.

The resultant force you exert on a shopping cart, for a 10 s period, is plotted on the graph, shown. Which of the following statements are true?


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Question 18.

How much work was required to bring the 1000-kg roller coaster from Point P to rest at Point Q at the top of the 50 m peak?


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Question 19.

If the roller coaster leaves Point Q from rest, how fast is it traveling at Point R?


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Question 20.

If the roller coaster leaves Point Q from rest, what is its speed at Point S (at the top of the 25-m peak) compared to its speed at Point R?


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Question 21.
What was the total work done on you by all the forces in the universe between the time just before you awoke this morning and right now?


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Question 22.
Two cars, starting from rest at the same place, travel by different routes to the same destination. One of the cars passes the other as they drive through it. Which of the following statements will be true?


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Question 23.
The work done by friction, f,


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Question 24.
A 102 kg man climbs a 5.0 meter high stair case at constant speed. How much work does he do?


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Question 25.

A ball is released, from rest, at the left side of the loop-the-loop, at the height shown (h = 2R). If the radius of the loop is R and there is no friction, what vertical height does the ball rise to on the other side?

(LOOP-THE-LOOP)


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