Advertisements
Advertisements
Question
What do you understand by the clockwise and anti clockwise moment of force?
Advertisements
Solution
If the turning effect on the body is clockwise, moment of force is called the clockwise moment and is taken as negative.
If the turning effect on the body is anticlockwise, moment of force is called the anticlockwise moment and is taken as positive.
RELATED QUESTIONS
One horse power is equal to ______.
What do you mean by uniform circular motion?
1 kWh = ______ J.
A man spends 7.4 kJ energy in displacing a body by 74 m in the direction in which he applies force, in 2.5 s. Calculate the power spent (in H.P) by the man.
A man raises a box of mass 50 kg to a height of 2 m in 20s, while another man raises the same box to the same height in 50s. Calculated:
- the work done, and
- the power developed by each man. Take g = 10 N kg-1.
Justify the statement. “Power can be expressed as the product of force and velocity.”
Derive a relation between the S.I. and C.G.S. unit of force.
Calculate the work done when:
A car is moved on a rough road through 30 m against a frictional resistance of 75 N.
For the following scenario, state whether the work done by gravity is positive, negative, or zero.
A person walks on a levelled road.
For the following scenario, state whether the work done by gravity is positive, negative, or zero.
A car in neutral gear is coming down the slope.
