Which of the following is a vector physical quantity?
Work
Kinetic energy
Moment of force
Potential energy
The product of force and velocity is called
impulse
torque
power
work
A body is placed on an inclined plane and has to be pushed down.The angle made by the normal reaction with the vertical will be
equal to the angle of repose
equal to the angle of friction
less than the angle of repose
more than the angle of friction
Which of the following units is associated with energy?
Nm-1
Jm-1
Ns
Kg m2 s-2
If the unit of force and length are increased by four times, then the unit of energy is increased by
2 times
4 times
8 times
16 times
Electron- volt is the unit of
energy
potential difference
momentum
A car covers the first-half of the distance between two places at 40 km/h and other half at 60 km/h. The average speed of the car is
40 km/h
48 km/h
50 km/h
60 km/h
When the force and displacement are perpendicular to each other, the work done is
Positive
negative
Zero
maximum
The ratio of 1 joule to 1 erg is
105
107
10-7
10-5
Two blocks P and Q are released at the top of a rough inclined plane so that P slides along the plane and Q falls down freely. Which will have higher velocity on reaching the ground?
P
Q
Both will reach the ground with same velocity
It depends on the coefficient of friction
