Quiz
Vectors and Dynamics Quiz
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Perguntas do quiz (19)
1Unless acted on by an external net force, an object will stay at rest or ........
- AA come to rest.
- BB decelerate at a constant rate
- CC slow from a given speed
- DD continue to move in a straight line at a constant speed.
2A 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?- AA 0.31
- BB 0.47
- CC 0.78
- DD 1.30
3A 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?- AA 5.33 N
- BB 14.3 N
- CC 23.6 N
- DD 24.9 N
4A 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.
- AA 0.20
- BB 0.31
- CC 0.51
- DD 0.67
5A 3.00 kg object is being accelerated vertically upwards at 2.80 m/s^2, as shown.
What is the tension in the cord?
- AA 8.40 N
- BB. 21.0 N
- CC. 29.4 N
- DD. 37.8 N
6What 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?
- AA. 6.4 N
- BB. 32 N
- CC. 49 N
- DD. 75 N
7An object is sliding down a smooth incline. If friction is negligible, the object has......
- AA constant velocity.
- BB constant momentum.
- CC. constant acceleration
- DD constant displacement.
8A 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?
- AA.
- BB.
- CC.
- DD.
- AA.
9A constant force is applied to an object on a frictionless surface, as shown in the diagram below.
The resulting motion has .....
- AA constant velocity.
- BB constant momentum.
- CC constant acceleration.
- DD constant kinetic energy.
10What 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 ?- AA 0.65 N
- BB 4.3 N
- CC 4.9 N
- DD 9.2 N
11The 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?
- AA
- BB
- CC
- DD
- AA
12A 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?
- AA Tension at Y = 20 N; Tension at Z = 40 N
- BB Tension at Y = 20 N; Tension at Z = 69 N
- CC Tension at Y = 28 N; Tension at Z = 56 N
- DD Tension at Y = 28 N; Tension at z = 69 N
13The frictionless system shown accelerates at 1.60 m/s^2 when released.
Find the tension in the string while the system is accelerating.
- AA 3.20 N
- BB 16.4 N
- CC 19.6 N
- DD 22.8 N
14Force 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?- AA 1.0 m/s^2
- BB 1.3 m/s^2
- CC 3.0 m/s^2
- DD 6.0 m/s^2
15A 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.
- AA 0.92 m
- BB 1.6 m
- CC 4.1 m
- DD 7.2 m
16The tension in the string shown is 12 N. Find the acceleration of mass m1.
- AA 3.0 m/s^2
- BB 6. 4 m/s^2
- CC 6.8 m/s^2
- DD 13 m/s^2
17A 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?- AA 1.2 m/s^2
- BB 1.5 m/s^2
- CC 9.8 m/s^2
- DD 11 m/s^2
18A 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?- AA 0.012
- BB 0.054
- CC 0.22
- DD 0.53
19The 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?- AA 2.0 x 10^1 N
- BB 2.0 x 10^3 N
- CC 2.0 x 10^4 N
- DD 4.0 x 10^4 N
Informações
- Descrição
- Á Physics quiz on vectors and dynamics
- Autor
- Jeffrey Piggott
- Idioma
- English
- Visualizações
- 15
- Etiquetas
- Avaliação
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