Advertisements
Advertisements
Question
State two effects of a force when applied on a body.
Solution 1
Two effects of applied force:
- It can change the state of body.
i.e. It can stop a moving object and also a force can move a stationary object. - A force can change the shape (and size) of an object.
Solution 2
-
Change in Motion:
- A force can make a stationary body move or change the speed and direction of a moving body.
- Example: Pushing a stationary car causes it to start moving.
-
Change in Shape or Size:
- A force can deform an object, altering its shape or size.
- Example: Squeezing a rubber ball changes its shape temporarily.
APPEARS IN
RELATED QUESTIONS
Less force is needed when applied at a farther distance from the pivoted point.
SI. unit of moment of force is
State two factors on which affect moment of force.
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.
State one way to reduce the moment of given force about a given axis of rotation.
One joule is the amount of work done when a force of ......... moves a body through a distance of .......
Fig. 5 shows a uniform meter scale weighing 200 gf. Provided at its centre. Two weights 300 gf and 500 gf are suspended from the ruler as shown in the diagram. Calculate the resultant torque of the ruler and hence calculate the distance from mid-point where a 100 gf should be suspended to balance the meter scale.