Advertisements
Advertisements
Question
Give an example for each of the following uses of a machine:
to change the point of application of force
Solution
A lever is used to change the point of application of force.
APPEARS IN
RELATED QUESTIONS
A force is applied on (i) a non-rigid body and (ii) a rigid body. How does the effect of the force differ in the above two cases?
Less force is needed when applied at a farther distance from the pivoted point.
In a door, handle is provided ......... from the hinges.
What is thrust?
Write an expression for the change in momentum of a body of mass m moving with velocity v if v << c.
A, B and C are the three forces each of magnitude 4 N acting in the plane of the paper as shown in Figure. The point O lies in the same plane.
- Which force has the least moment about O? Give a reason.
- Which force has the greatest moment about O? Give a reason.
- Name the forces producing
(a) Clockwise
(b) anticlockwise moments. - What is the resultant torque about the point O?
The moment of a force about axis depends ______.
Classify the following amongst contact and non-contact forces.
magnetic force
A jack screw is provided with a long arm. Explain why?
State the effects that a force can produce. Given one example of each.