Question

Q.8 Mohit throws a ball horizontally while Shobhit throws a ball vertically downwards from a tower. Both of them do so in an attempt to see who hits the stone on ground first. After that, they try to reason their findings
Read the above passage and answer the following questions (i) Gravitational force depends on
(a) mass of the objects
(b) mass and gravitational force of earth
(c) weight of the objects
(d) none of these
(ii) Give the relationship between g and G?
(a) g = Gm1m2/
(b) G=gm m2/R?
(c) Both a and b
(d) None of these
(iii) Write the value of G along with its S.I. unit.
(a) 6.67 x 10- N m²/kg?
(b) 6.67 x 10-1° N m²/gm?
(c) 7.32 x10-11
kg m/s2
(d) None of these​

Answer 1

u=0

a=tv−u

v=20secm

For the second ball the ball is thrown with initial speed 20secm and t=2sec

S=ut+21at2

By substituting the given values in above equation we get

S=60m

Hence, the height of the tower is 60m

Step-by-step explanation:

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