Question

ce: Physics for Class 9
8. A body weighs 120 N on the earth. Find its
approximate weight on the noon.
9. Calculate the value of the acceleration due to gravi
at a place 3,200 kn above the surface of the earth.
10. The acceleration due to gravity at a place is 0.2 m/s2
Find its height above the earth's surface.
11. As one moves to a place 3,200 km above the earth's
surface, the acceleration due to gravity reduces to
4/9 of its value at the earth's surface. Calculate the
radius of the earth from this data.
A ball is dropped from a cliff. Find (a) its speed 2 s
after it is dropped, (b) its speed when it has fallen
through 78.4 m, and (c) the time taken in falling
through 78.4 m.
​

Answer 1

Answer:

m=120N, g (in moon) =1.625ms^-2

W=mg

=120×1.625

=195N