An elevator weighing 3.5 x 10-6 N is raised to a height of 1000 m in the absence of friction, the work done is_________________?

A. 3.5 x 103 j
B. 3.5 x 104 j
C. 3.5 x 106 j
D. 3.5 x 109 j

The relation between horse power and watt is_________________?

A. 1 hp = 546 watts
B. 1 hp = 746 watts
C. 1 hp = 1000 watts
D. 1 hp = 946 watts

The source of tidal energy is____________________?

A. Sun
B. Earth
C. Both a and b
D. Moon

On a clear day at noon the solar energy reaching the earth is ____________________?

A. 1.44kw/m2
B. 1.4kw/m2
C. 1 kw/m2
D. None

A field in which the work done in a moving a body along closed path is zero is called________________?

A. Electric field
B. Conservative field
C. Electromagnetic field
D. Gravitational field

If moon radius is 1600 km and g on its surface is 1.6 ms-2 then the escape velocity on the moon is ___________________?

A. 1600 ms-1
B. 50.6 ms-1
C. 71.6 ms-1
D. 2263ms-1

When arrow is released form its bow, its energy is transformed from _____________________?

A. Heat energy to k.e
B. Elastic p.e to k.e
C. Elemical energy to elastic p.e
D. K.e to elastic p.e.

The work done by friction is__________________?

A. Positive
B. Negative
C. Zero
D. None of these

The dimension of power is_______________?

A. [ml2t-3]
B. [ml2t-2]
C. [ml2t3]
D. None of these

The dot product of force and velocity is__________________?

A. Power
B. Work
C. Impulse
D. Torque