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Home » General Knowledge » Aptitude Test - 56
Hassan
1.For a body moving in a circular path, the work done by the centripetal force is?
A. Negative
B. Positive
C. Constant
D. Negative
2.A gardener pushes a lawn roller through a distance of 20m. If he applies a force of 20kg weight in a direction inclined at 60° to the ground, find the work done by him. (g=9.8m/s2)?
A. 400J
B. 1960J
C. 250J
D. 400J
3.A person is holding a bucket by applying a force of 10N. He moves a horizontal distance of 5m and then climbs up a vertical distance of 10m. Find the total work done by him?
A. 50J
B. 150J
C. 100J
D. 50J
4. A bullet fired from a gun can pierce a target due to its?
A. Mechanical energy
B. Heat energy
C. Kinetic energy
D. Mechanical energy
5.When force and displacement are in the same direction, the kinetic energy of the body?
A. Increases
B. Decreases
C. Remains constant
D. Increases
6.The momentum of a body of mass 5kg is 500kgm/s. Find its kinetic energy?
A. 2×105 J
B. 2.5×104 J
C. 2.5×105 J
D. 2×105 J
7.A bullet of mass 20g is found to pass two points 30m apart in a time interval of 4s. Calculate the kinetic energy of the bullet if it moves with constant speed.
A. 2.5J
B. 5J
C. 0.562J
D. 2.5J
8.What energy does a stretched bow posses?
A. Kinetic energy
B. Gravitational energy
C. Elastic potential energy
D. Kinetic energy
9.Which of the following is not a conservative force?
A. Elastic force
B. Gravitational force
C. Force of friction
D. Elastic force
10.Calculate the velocity of the bob of a simple pendulum at its mean position if it is able to rise to a vertical height of 10cm. Take g = 9.8m/s2?
A. 5m/s
B. 1.5m/s
C. 14m/s
D. 5m/s
11.How high must the body be lifted to gain an amount of potential energy equal to the kinetic energy it has when moving at a speed of 20m/s? g=9.8m/s2?
A. 20m
B. 20.0m
C. 202m
D. 20m
12.A ball is thrown vertically upwards with a velocity of 20m/s. At what height, will its kinetic energy be half its original value?
A. 10.20m
B. 10m
C. 15m
D. 10.20m
13.How much mass is converted into energy per day in Tarapur nuclear power plant operated at 107 kW?
A. 10g
B. 9g
C. 9.6g
D. 10g
14.A machine gun fires 60 bullets per minute, with a velocity of 700m/s. If each bullet has a mass of 50g, find the power developed by the gun.
A. 1225W
B. 12250W
C. 122.5W
D. 1225W
15.Which of the following is an example of inelastic collision?
A. Collision between two vehicles
B. Collision between glass balls
C. A bullet fired into a wooden block
D. Collision between two vehicles
16.Mud thrown on a wall and sticking to it is an example for?
A. Inelastic collision
B. Elastic collision
C. Super elastic collision
D. Inelastic collision
17.Collision between two carom coins is an example for?
A. Oblique collision
B. Perfectly inelastic collision
C. Inelastic collision
D. Oblique collision
18.When a light body collides with a massive body at rest?
A. The light body rebounds after the collision
B. The light body Remains at rest
C. The massive body rebounds after the collision
D. The light body rebounds after the collision
19.When a massive body collides against a light body at rest?
A. The light body starts moving
B. The light body rebounds
C. The velocity of the bodies get exchanged
D. The light body starts moving
20.If a force acts perpendicular to the direction of motion of a body, what is the amount of work done?
A. Sinθ
B. Zero
C. Constant
D. Sinθ
21.In which of the following the momentum and energy of each body not conserved?
A. Inelastic collision
B. Oblique collision
C. Elastic collision
D. Inelastic collision
22.In an elastic collision of two billiard balls, the total kinetic energy is conserved?
A. Completely
B. For a short duration
C. For a long duration but not completely
D. Completely
23.Which of the following is an example for a force which does work on a body but fails to change its kinetic energy?
A. A body pulled through a plain surface
B. A body pulled through a vertical surface
C. A body pulled through a horizontal surface
D. A body pulled through a plain surface
24.Two masses of 1g and 4g are moving with equal kinetic energy. The ratio of the magnitudes of their momenta is?
A. 4:1
B. √2:1
C. 1:2
D. 4:1
25.If a machine is lubricated with oil?
A. The mechanical advantage of the machine increases
B. The mechanical efficiency of the machine increases
C. Both its mechanical advantage and efficiency increases
D. The mechanical advantage of the machine increases
26.A hammer is resting on a plane surface. If force P is applied on the hammer along with a line not passing through its centre of mass, them the hammer?
A. Moves along a straight line path
B. Stays still
C. Is thrown away
D. Moves along a straight line path
27.The point where whole weight may be assumed to act is called?
A. Centre of mass
B. Centre of weight
C. Centre of gravity
D. Centre of mass
28.Which of the following retain their relative positions even when they move under the action of an external force?
A. Rotation body
B. Stationary body
C. Rigid body
D. Rotation body
29.On the application of a constant torque, a wheel is turned from rest through 400 radians in 10s. Find the angular acceleration.
A. 6 rad/s2
B. 4 rad/s2
C. 2 rad/s2
D. 6 rad/s2
30.A ball of mass 2kg and another of mass 4kg are dropped together from a 60feet tall building. After a fall of 30 feet each towards earth, their respective kinetic energies will be in the ration of?
A. √2:1
B. 1:4
C. 1:2
D. √2:1
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