Advertisements
Advertisements
Question
A spanner (or wrench) has a long handle. Why?
Advertisements
Solution
The long handle of the spanner creates a greater turning moment. The handles' ends are used with less force.
APPEARS IN
RELATED QUESTIONS
The S.I. unit of force is kgf. (kilogram-force)
In a door, handle is provided ......... from the hinges.
What do you mean by the clockwise and anti-clockwise moment of force?
State one way to obtain greater moment of a given force about a given axis of rotation.
What are contact forces? Give two Example
Name of S.I. unit of the rate of change in momentum.
A rocket is moving at a constant speed in space by burning its fuel and ejecting out the burnt gases through a nozzle. Answer the following
1) Is there any change in the momentum of the rocket? if yes, what causes the change in momentum?
2) Is there any force acting on the rocket? if yes, how much?
A car of mass 600 kg is moving with a speed of 10 ms-1 while a scooter of mass 80 kg us moving with a speed of 50 ms-1. Compare their momentum.
Under what condition will a set of gears produce a gain in torque.
On a see-saw, two children of masses 30 kg and 50 kg are sitting on one side of it at distance 2 m and 2.5 m respectively, from its middle, where should a man of mass 74 kg sit to balance it?
