Page 8 - Simplied Force

SIMPLIFIED COURSE ON SEE SCIENCE : CHAPTER- FORCE

• The mass of the Jupiter is about 319 times heavier than that of the earth but its acceleration due to
gravity is only about 2.636 times greater than that of the earth.

Even though the mass of the Jupiter is so much heavier than that of the earth, the square of its radius reduces
the value of acceleration due to gravity. Thus the mass of the Jupiter is about 319 times heavier than that of
the earth but its acceleration due to gravity is only about 2.636 times greater than that of the earth.
• The objects fall faster at the pole than at the equator.

The value of acceleration due to gravity at the pole of the earth is 9.83m/s and that at the equator is 9.78m/s .
When an object is dropped from a certain height at the pole and another identical object is dropped from the
same height at the equator then the velocity of the falling object at the pole increases faster. So, the objects
fall faster at the pole than at the equator.

• The value of acceleration due to gravity is less at the top of Mt. Everest than in the terai region.
When height ‘h’ from the sea level increases, the value of. acceleration due to gravity decreases. Height at Mt.
Everest is more than that at the terai in our country. Hence, the value of acceleration due to gravity is less at
the top of Mt. Everest than that in the terai region.

• It is easier to lift a lighter object than a heavier one.

At a particular place on the earth, the value of acceleration due to gravity is constant. The weight of an object
is directly proportional to its mass. It shows that a lighter object is attracted with less force and the heavier
object is attracted with more force. So, it is easier to lift a lighter object than a heavier one.

• Weight of a body at the center of the earth will be zero.
The value of acceleration due to gravity ‘g’ is zero at the center of the earth. Thus, weight of the body at the
center of the earth is W= mg = 0 . So, weight of a body at the center of the earth will be zero.

• The weight of a body changes from place to place on the earth.

The weight of a body is given by K/ - mg, where 'm' is the mass of the body and 'p'is the acceleration due to
gravity at that place. It shows that the weight of a body is directly proportional to the acceleration due to
gravity. The value of ‘g‘ changes from place to place on the earth. So, the weight of a body changes from place
to place on the earth.

• A person who can lift 50kg in the earth can lift approximately 300kg in the moon.
The gravity of the moon is approximately one sixth of the earth. So, a person who can lift 50kg in the earth
can lift approximately 300kg in the moon.

• A person who can jump lm on the earth can jump 6m on the moon.

The value of acceleration due to gravity of the moon is almost 6 times less than that of the earth. So. a person
who can jump lm on the earth can jump about 6m on the moon.

Shiva Mainali www.shivamainali.com.np shiva@shivamainali.com.np