Advertisements
Advertisements
प्रश्न
State the effects that a force can produce. Given one example of each.
Advertisements
उत्तर
A force can produce the following three effects:
(i) It can bring changes in dimensions. For example, in stretching a spring its length increases.
(ii) It can start or stop motion. For example, a ball moves when kicked.
(iii) It can change the speed or direction of motion. For example, a hockey player changes the speed and direction of the motion of the ball by his stick.
संबंधित प्रश्न
The steering wheel of a vehicle is of large diameter.
It is easier to open the door by pushing it at its free end.
Write the expression for calculating the moment of force about a given an axis.
What do you understand by the clockwise and anticlockwise moment of force? When is it taken positive?
The moment of a force of 10 N about a fixed point O is 5 N m. Calculate the distance of the point O from the line of action of the force.
Define couple.
Calculate the resultant moment of forces about O and state its direction in fig.

A jack screw is provided with a long arm. Explain why?
Calculate the length of arm of couple, if a force of 13 N produces a moment of couple of 14.3 Nm.
A nut is opened by a wrench of length 25 cm. If the least force required is 10 N, find the moment of force needed to turn the nut.
