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Question (1)

QN0035044

A train is moving with a speed of hour on a curved path of radius . If the distance between the rails is 1.5 , the height of the outer rail over the inner rail is

(A)
(B)
(C)
(D)

Correct Answer: D

Explanation:

hour .

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Question (2)

QN0035045

A block of mass slides on the wooden wedge, which in turn slides backward on the horizontal surface. The acceleration of the block with respect to the wedge is: Given . Assume all the surfaces shown in the figure to be frictionless.

(A)
(B)
(C)
(D)

Correct Answer: D

Explanation:

Putting these values, we get .

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Question (3)

QN0035046

A car is moving in a circular horizontal track of radius with a constant speed of . A bob is suspended from the roof of the car by a light wire of length . The angle made by the wire with the vertical is

(A)
(B)
(C)
(D)

Correct Answer: D

Explanation:

Given; speed ; radius Angle made by the wire with the vertical

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Question (4)

QN0035047

A car is moving in a circular horizontal track of radius with a constant speed of . A bob is suspended from the roof of the car by a light wire of length . The angle made by the wire with the vertical is

(A)
(B)
(C)
(D)

Correct Answer: D

Explanation:

Given; speed ; radius Angle made by the wire with the vertical

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Question (5)

QN0035048

A person with his hands in his pockets is skating on ice at the velocity of and describes a circle of radius . What is his inclination with vertical

(A)
(B)
(C)
(D)

Correct Answer: D

Explanation:

The inclination of person from vertical is given by

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Question (6)

QN0035049

A block of mass placed inside a box descends vertically with acceleration ' '. The block exerts a force equal to onefourth of its weight on the floor of the box. The value of ' ' will be:

(A)
(B)
(C)
(D)

Correct Answer: C

Explanation:

For observer in box

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Question (7)

QN0035050

When an elevator cabin falls down, the cabin and all the bodies fixed in the cabin are accelerated with respect to

(A)
ceiling of elevator
(B)
floor of elevator
(C)
man standing on earth
(D)
man standing in the cabin

Correct Answer: C

Explanation:

When an elevator cabin falls down, it is accelerated down with respect to earth i.e. man standing on earth.

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Question (8)

QN0035051

A monkey is climbing up a rope, then the tension in the rope

(A)
must be equal to the force applied by the monkey on the rope
(B)
must be less than the force applied by the monkey on the rope.
(C)
must be greater than the force applied by the monkey on the rope.
(D)
may be equal to, less than or greater the force applied by the monkey on the rope.

Correct Answer: A

Explanation:

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Question (9)

QN0035052

If rope of lift breaks suddenly, the tension exerted by the surface of lift ( acceleration of lift)

(A)
(B)
(C)
(D)

Correct Answer: D

Explanation:

If rope of lift breaks suddenly, then acceleration becomes equal to so that tension .

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Question (10)

QN0035053

A spring balance is attached to the ceiling of a lift. A man hangs his bag on the spring and the spring reads , when the lift is stationary. If the lift moves downward with an acceleration of , the reading of the spring balance will be

(A)
(B)
(C)
(D)

Correct Answer: A

Explanation:

Mass

When lift is moving downward

Apparent weight

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Question (1)

A train is moving with a speed of hour on a curved path of radius . If the distance between the rails is 1.5 , the height of the outer rail over the inner rail is

Explanation:

Link:

Question (2)

A block of mass slides on the wooden wedge, which in turn slides backward on the horizontal surface. The acceleration of the block with respect to the wedge is: Given . Assume all the surfaces shown in the figure to be frictionless.

Explanation:

Link:

Question (3)

A car is moving in a circular horizontal track of radius with a constant speed of . A bob is suspended from the roof of the car by a light wire of length . The angle made by the wire with the vertical is

Explanation:

Link:

Question (4)

A car is moving in a circular horizontal track of radius with a constant speed of . A bob is suspended from the roof of the car by a light wire of length . The angle made by the wire with the vertical is

Explanation:

Link:

Question (5)

A person with his hands in his pockets is skating on ice at the velocity of and describes a circle of radius . What is his inclination with vertical

Explanation:

Link:

Question (6)

A block of mass placed inside a box descends vertically with acceleration ' '. The block exerts a force equal to onefourth of its weight on the floor of the box. The value of ' ' will be:

Explanation:

Link:

Question (7)

When an elevator cabin falls down, the cabin and all the bodies fixed in the cabin are accelerated with respect to

Explanation:

Link:

Question (8)

A monkey is climbing up a rope, then the tension in the rope

Explanation:

Link:

Question (9)

If rope of lift breaks suddenly, the tension exerted by the surface of lift ( acceleration of lift)

Explanation:

Link:

Question (10)

A spring balance is attached to the ceiling of a lift. A man hangs his bag on the spring and the spring reads , when the lift is stationary. If the lift moves downward with an acceleration of , the reading of the spring balance will be

Explanation:

Link:

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