Weight
Weight
The Earth attracts all bodies towards its centre. The force exerted by the Earth on a body is called the weight of the body. This force acts towards the centre of earth that is in vertically downward direction. It is an example of non contact force , even if the an object is not in contact with the Earth, the Earth pulls it. The weight of an object having the mass as “m”, placed on the surface of earth, is given by the relation
where g= acceleration due to gravity
Due to low gravitational force on the moon. The acceleration due to gravity on Moon is one sixth of the acceleration due to gravity of Earth. Thus the weight of a person on moon is of the weight on the earth.
Illustration: A person has a mass as 70 kg, while the acceleration due gravity on Earth is . Find out the weight of this person?
Solution: Here, mass(m) = 70 kg and g =
As we know that weight
Therefore,
Hence, the weight of the person = 686 N
Illustration: An individual weighs 250 N on the moon. Calculate the mass of the individual .
Solution: Here, w = 250 N and acceleration due to gravity(g') on moon =
As we know
Therefore,
A parrot is sitting on the floor of a closed glass cage which is in a boy's hand. If the parrot starts flying with a constant speed, the boy will feel the weight of the cage as--- | |||
| Right Option : A | |||
| View Explanation | |||
The force exerted by the Earth on a body is called the ___________________ . | |||
| Right Option : A | |||
| View Explanation | |||
The stress in the
| |||
| Right Option : A | |||
| View Explanation | |||
Students / Parents Reviews [10]
It was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
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8thAbhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
