Question 1
Question
Unless acted on by an external net force, an object will stay at rest or ........
Answer
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A come to rest.
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B decelerate at a constant rate
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C slow from a given speed
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D continue to move in a straight line at a constant speed.
Question 2
Question
A 65.0 kg block is being accelerated along a level surface. The applied force is 500 N and the
friction force is 300 N. What is the coefficient of friction between the block and the surface?
Answer
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A 0.31
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B 0.47
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C 0.78
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D 1.30
Question 3
Question
A 2.00 kg object, initially at rest on the ground, is accelerated vertically by a rope, as shown.
The object reaches a height of 3.00 m in 1.50 s.
What is the tension in the rope during the acceleration?
Answer
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A 5.33 N
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B 14.3 N
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C 23.6 N
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D 24.9 N
Question 4
Question
A 4.00 kg block is accelerated along a level surface at 3.00 m/s^2.
The applied force is 20.0 N.
What is the coefficient of friction between the block and the surface?e applied force is 20.0 N.
Answer
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A 0.20
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B 0.31
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C 0.51
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D 0.67
Question 5
Question
A 3.00 kg object is being accelerated vertically upwards at 2.80 m/s^2, as shown.
What is the tension in the cord?
Answer
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A 8.40 N
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B. 21.0 N
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C. 29.4 N
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D. 37.8 N
Question 6
Question
What minimum horizontal force F will just prevent the 5.0 kg block from sliding if the coefficient
of friction between the wall and the block is 0.65?
Answer
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A. 6.4 N
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B. 32 N
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C. 49 N
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D. 75 N
Question 7
Question
An object is sliding down a smooth incline. If friction is negligible, the object has......
Answer
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A constant velocity.
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B constant momentum.
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C. constant acceleration
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D constant displacement.
Question 8
Question
A pendulum is swinging freely between points R and S as shown in the diagram below.
Which of the following diagrams best represents the forces acting on the pendulum bob at point R?
Question 9
Question
A constant force is applied to an object on a frictionless surface, as shown in the diagram below.
The resulting motion has .....
Question 10
Question
What is the frictional force due to air resistance on a 0.50 kg object falling vertically with an
acceleration of 8.5 m/s^2 ?
Answer
-
A 0.65 N
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B 4.3 N
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C 4.9 N
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D 9.2 N
Question 11
Question
The diagram below shows a cart being pulled up a frictionless slope by a rope.
Which of the following best represents the free body diagram for the cart?
Question 12
Question
A massless, frictionless pulley is suspended by a rope. When the masses are allowed to accelerate,
the tension in the string joining them is 28 N at X . What will the tension be at Y and at Z?
Answer
-
A Tension at Y = 20 N; Tension at Z = 40 N
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B Tension at Y = 20 N; Tension at Z = 69 N
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C Tension at Y = 28 N; Tension at Z = 56 N
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D Tension at Y = 28 N; Tension at z = 69 N
Question 13
Question
The frictionless system shown accelerates at 1.60 m/s^2 when released.
Find the tension in the string while the system is accelerating.
Answer
-
A 3.20 N
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B 16.4 N
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C 19.6 N
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D 22.8 N
Question 14
Question
Force F gives mass m1 an acceleration of 4.0 m/s^2.
The same force F gives mass m2 an acceleration of 2.0 m/s^2
What acceleration would force F give to the two masses m1 and m2 if they were glued together?
Answer
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A 1.0 m/s^2
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B 1.3 m/s^2
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C 3.0 m/s^2
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D 6.0 m/s^2
Question 15
Question
A 4.0 kg block has a speed of 9.0 m/s at X.
What is the maximum distance, d, travelled by the block? Ignore friction.
Answer
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A 0.92 m
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B 1.6 m
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C 4.1 m
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D 7.2 m
Question 16
Question
The tension in the string shown is 12 N. Find the acceleration of mass m1.
Answer
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A 3.0 m/s^2
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B 6. 4 m/s^2
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C 6.8 m/s^2
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D 13 m/s^2
Question 17
Question
A 75 kg man stands on a scale while accelerating upwards in an elevator.
If the scale reads 850 N, what is the magnitude of the acceleration of the elevator?
Answer
-
A 1.2 m/s^2
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B 1.5 m/s^2
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C 9.8 m/s^2
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D 11 m/s^2
Question 18
Question
A 45 kg toboggan and rider decelerate on level snow at 0.53 m/s^2
What is the coefficient of friction between the toboggan and the snow?
Answer
-
A 0.012
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B 0.054
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C 0.22
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D 0.53
Question 19
Question
The 2.0 kg head of an axe strikes a tree horizontally at 40 m/s.
The blade penetrates 0.040 m into the tree.
What is the average force exerted by the blade on this tree?
Answer
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A 2.0 x 10^1 N
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B 2.0 x 10^3 N
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C 2.0 x 10^4 N
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D 4.0 x 10^4 N