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Q.1: The shaft of a motor rotates at a constant angular speed of 360rev/min. Angle turned through in 1 sec in radian is——–?
Q.2: What is the outward force acting on a mass of 10 kg when rotating at one end an inelastic string 10m long at speed of 1m/s ?
Q.3: If we whirl a stone at the end of a string in the vertical circle, it is likely to break when the stone is——–?
- At the highest point
- At the lowest point
- At any point during motion
- At the point where gravity is not acting
Q.4: Moving along the circumference of a circle completes two revolutions. If the radius of the circular path is R, the ratio of displacement to the covered path will be——–?
Q.5: A man of weight W is standing on an elevator which is ascending with an acceleration a. The apparent weight of the man is——–?
- mg – ma
- mg + ma
- mg – ma
Q.6: Who discovered the inverse square law for gravity ?
Q.7: The planet nearest to the earth is——-?
Q.8: A satellite moving around the earth constitutes——-?
- An inertial frame of reference
- Non-inertial frame
- Neither inertial nor non-inertial
- Both inertial and non-inertial
Q.9: Minimum number of communication satellites required to cover the whole earth is——-?
Q.10: A body of 2 kg is suspended from the ceiling of an elevator moving up with an acceleration g. Its apparent weight in the elevator will be——-?
- 9.8 N
- 19.6 N
- 129.4 N
- 39.2 N