Advertisements
Advertisements
Question
Answer the following in detail.
List all the forces acting on a boy sitting on a chair with the help of a suitable diagram.
Advertisements
Solution
1. Gravitational force (noncontact) acting downwards, Fgrav
2. The normal contact force of the chair acting upwards (Fnorm)
Both the forces are opposite and equal and balance each other.

APPEARS IN
RELATED QUESTIONS
Write true or false.
A wet oily road offers more friction than a dry rough road.
Fill in the blank.
Friction ....................... the motion.
Name the type of force which act in the following case:
A magnet attracts an iron pin
Answer the following in short.
What will happen to an object if two equal forces act on it in opposite directions?
Identify the agent exerting the force, the object on which the force is acting and the effect of the force in the following situation
A child jumping to a height.
Give a reason for the following.
Vehicles skid on muddy and wet roads. Suggest what type of tires can prevent skidding of vehicles?
Answer the following in detail.
Why do all objects have a tendency to fall towards the centre of the earth?
What is momentum? Write its SI unit. Interpret force in terms of momentum. Represent the following graphically
(a) momentum versus velocity when mass is fixed.
(b) momentum versus mass when velocity is constant.
A ball of dough is rolled into a flat chapatti. Name the force exerted to change the shape of the dough.
Two women are of the same weight. One wears sandals with pointed heels while the other wears sandals with flat soles. Which one would feel more comfortable while walking on a sandy beach? Give reasons for your answer.
