Physics Laws of Motion Test 2 Online MCQs

1. A book is lying on the inclined plane having inclination to the horizontal θ°. What is the angle between the weight of the book and the reaction of the plane on the book?

2. A block is allowed to slide down an inclined plane of inclination θ. If, the inclined plane is lying on the floor of a lift which is falling down with a retardation a, what will be the acceleration of the block with which it will slide down?

3. A rope of mass M is held vertically by fixing its upper end to a rigid support. What will be the tension in the rope at a distance x from the rigid support? Give that the length of the rope is L, and acceleration due to gravity is g:

4. A mass when dropped vertically from the top of the smooth inclined planed reached the ground with the velocity of 50 ms^-1. If it is allowed to move along the inclined planed, what will be the horizontal component of the velocity on reaching the ground? Angle of inclination of the plane is 30°.

5. A particle of mass 2 kg is moving along a circular path of radius 1 m. If its angular speed 2 π rad s^-1, the centripetal force on it is:

6. A monkey of mass 20 kg is holding a vertical rope. The rope can break when a mass of 25 kg is suspended from it. What is the maximum acceleration with which the monkey can climb up along the rope?

7. In which of the following cases the net force is not zero?

8. The velocity time graph of a lift moving downwards is a straight line inclined to the time axis at 45°. If mass of the lift is M kg, what is the effective weight (in newton) of the lift? Take g = 10 ms^-2.

9. A sparrow flying in the air sits on a stretched telegraph wire. If weight of the sparrow is W. Which of the following is true about the additional tension T produced in the wire

10. Which of the following statements is true for the jet plane flying horizontally at very high speed?