Question

at the surface of rearth value of g is 48N. At what depth it's weight will become 1/2 of it​

Answer 1

Explanation:

Given that,

Weight of body W=144N

Height h=3R

Radius of earth =R

We know that,

Acceleration due to gravity at the surface of the earth =g

Acceleration due to gravity at height g

′

=3R

Now,

g

′

g

=(

R+h

R

)

2

g

′

g

=(

R+3R

R

)

2

g

′

g

=

16

1

Now, weight at the height

w

w

′

=

mg

mg

′

w

w

′

=

16

1

w

′

=

16

w

w

′

=

16

144

w

′

=9N

Hence, the weight at the height is 9 N