Physics
(a) The diagram below shows a heavy roller with its axle at O. Draw on the diagram the direction and the point of application of the least force to turn it anticlockwise.
(b) How can you change the direction of turning of roller in part(a) above.
Force
7 Likes
Answer
(a) In order to rotate the heavy roller in anticlockwise direction, we need to apply force F as shown in the diagram below:
(b) The direction of turning of roller can be changed from anticlockwise to clockwise direction in two ways:
(1) The direction of application of force can be changed, keeping the point of application of force the same as shown in the diagram below:
(2) The point of application of force can be changed, keeping the direction of application of force the same as shown in the diagram below:
Answered By
5 Likes
Related Questions
When a boy weighing 20 kgf sits at one end of a 4m long see-saw, it gets depressed at its end. How can it be brought to the horizontal position by a man weighing 40 kgf.
Figure shows two forces each of magnitude 10N acting at the points A and B at a separation of 50 cm, in opposite directions. Calculate the resultant moment of the two forces about the point (i) A, (ii) B and (iii) O, situated exactly at the middle of the two forces.
When does a body rotate? State one way to change the direction of rotation of a body. Give a suitable example to explain your answer.
A steering wheel of diameter 0.5m is rotated anti-clockwise by applying two forces each of magnitude 5N. Draw a diagram to show the application of forces and calculate the moment of forces applied.