Advertisements
Advertisements
प्रश्न
Give an example for each of the following uses of a machine:
to change the point of application of force
Advertisements
उत्तर
A lever is used to change the point of application of force.
APPEARS IN
संबंधित प्रश्न
How does the effect of force differ when it is applied on a rigid body?
In Fig. a force F is applied in a direction passing through the pivoted point O of the body. Will the body rotate? Give reason to support your answer.
It is easier to open the door by pushing it at its free end.
What is thrust?
What are non-contact forces? Give two example
Calculate the acceleration produced in a body of mass 50 g when acted upon by a force of 20 N.
The figure shows two forces each of magnitude 10 N acting at the point A and B at a separation of 50 cm, in opposite directions. Calculate the resultant moment of two forces about the point.
- A,
- B and
- O situated exactly at the middle of the two forces.
Explain the motion of a planet around the sun in a circular path.
Classify the following amongst contact and non-contact forces.
normal reaction force,
Fig. shows a uniform meter scale weighing 100 N pivoted at its centre. Two weights of 500 N and 300 N are hung from the ruler as shown in fig.
(i) Calculate total clockwise and anticlockwise moments.
(ii) Calculate difference in clockwise moment and anticlockwise moment.
(iii) Calculate the distance from O where a 100 N weight should be suspended to balance the meter scale.
