Question

5. Solve the following examples.
a. An object takes 5 s to reach the
ground from a height of 5 m on a
planet. What is the value of g on the
planet?
Ans: 0.4 m/s2
b. The radius of planet A is half the
radius of planet B. If the mass of A is
M., what must be the mass of B so
that the value of g on B is half that of
its value on A?
Ans: 2M
c. The mass and weight of an object on
earth are 5 kg and 49 N respectively.
What will be their values on the
moon? Assume that the acceleration
due to gravity on the moon is 1/6th
of that on the earth.
Ans: 5 kg and 8.17 N
in step by step method​

Answer 1

Answer:

5th a ans 0.4m/sec

Explanation:

h = 1/2gt2

g= 2h/t2

g = 2*5/5*5

so g= 0.4 m/sec2