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Question (11)
QN0043
A block of mass m is placed on a smooth wedge of wedge angle . The whole system is accelerated horizontally so that the block does not slip on the wedge. The force (normal reaction) exerted by the wedge on the block has a magnitude :
  • (A) $$ mg tan $$
  • (B) M
  • (C) 2M
  • (D) A function of M and force constant k of spring

Correct Answer: B
Explanation:

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Question (12)
QN0044
A weightless inextensible rope rests on a stationary wedge forming an angle with the horizontal. One end of the rope is fixed to the wall at point A. A small load is attached to the rope at point B. The wedge starts moving to the right with a constant acceleration a. The acceleration of the load is given by
  • (A) a
  • (B) $$ 2a sin $$
  • (C) a sin
  • (D) g sin

Correct Answer: B
Explanation:

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Question (13)
QN0045
If a force is applied at an angle to a body moving along a straight line :
  • (A) The body continues to move in the direction of force
  • (B) The body continues to move in its initial direction of motion
  • (C) The body moves in a fixed direction other than that of force and initial motion
  • (D) The body moves in a direction other than that of force and initial motion which varies with time

Correct Answer: D
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Question (14)
QN0046
A car traveling at a speed of 30 km/ hr is brought to a halt in 8 m by applying brakes. If the same care is traveling at 60 km/ hr it can be brought to a halt with the same braking force in :
  • (A) 8 m
  • (B) 16 m
  • (C) 24m
  • (D) 32 m

Correct Answer: D
Explanation:

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Question (15)
QN0047
When a horse pulls a wagon, the force that causes the horse to move forward is the force :
  • (A) He exerts on the wagon
  • (B) The wagon exerts on him
  • (C) The ground exerts on him
  • (D) He exerts on the ground

Correct Answer: C
Explanation:

$$ is order , degree order , degree

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Question (16)
QN0048
In the figure s > d. They are connected by a light inextensible string passing over a smooth pulley. When the system is released, then mass in will accelerate towards the pulley provided:
  • (A) B
  • (B)
  • (C) D
  • (D)

Correct Answer: A
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Question (17)
QN0049

The pulley P 1 and P 2 in the figure are frictionless. If m is allowed to fall and the string is assumed massless then

  • (A)

    Acceleration of mass m is twice that of M

  • (B)

    Tension in the string remains constant through out the motion

  • (C)

    Acceleration of mass m is a =

  • (D)

    tension in the string is Solution : The order and degree of the differential equation is order , degree order , degree order , degree order , degree

Correct Answer: B
Explanation:

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