Physics Test Preparations On Applied Mechanics Part 2

Test Preparation on Physics Test Preparations On Applied Mechanics Part 2

1.

A Seconds pendulum executes

10.5 beat per second
21.0 beat per second
32.0 beats per second
43 beats per second.

2.

A Second's pendulum gains 2 minutes a day. To make it to keep correct time its length

1must be decreased
2must be increased
3is not changed but weight of the bob is increased
4is not changed but weight of the bob is decreased

3.

The following is not a law of static friction :

1The force of friction always acts in a direction opposite to that in which the body tends to move
2The force of friction is dependent upon the area of contact
3The force of friction depends upon the roughness of the surface
4The magnitude of the limiting friction bears a constant ratio to the normal reaction between two surfaces.

4.

The velocity of a moving body is

1a vector quantity
2a scalar quantity
3a scalar as well as a vector quantity
4none of these

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