Advertisements
Advertisements
Question
State the condition when the work done by the force is positive
Solution
Work done by a force is positive when the displacement is in the direction of the force.
APPEARS IN
RELATED QUESTIONS
An ox can apply a maximum force of 1000 N. It is taking part in a cart race and is able to pull the cart at a constant speed of 30 ms-1 while making its best effort. Calculate the power developed by the ox.
Is it possible that no transfer of energy may take place even when a force is applied to a body?
State the principle of moments.
A body is provided at a point. A force of 20 N is applied at a distance of 40 cm from the pivot. Find the moment of force about the pivot.
The moment of a force 10 N about a point 0 is 4 Nm. Calculate the distance of point of application of force from the point 0.
Work is a scalar quantity because it is a measure of transfer of energy without indicating any direction
In which one of the following cases is the work done more? When the angle between the direction of motion and that of the force is (i) 90° (ii) 0°.
Define one newton. Write the relation between the S. I. unit and the C.G.S. unit of force.
Define 1 kgf., How is it related to the S.I. unit of force?
A coolie carries a load of 30 kgf through a distance of 500 m in 5 minutes while another coolie B carries the same load through the same distance in 10 minutes. Compare the
(i) work done, and
(ii) power developed. (Take: g = 10md−2)