Physics Laws of Motion Test 2 Online MCQs

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

2. 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:

3. 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.

4. 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?

5. 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

6. 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:

7. 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?

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

9. 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?

10. 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°.