You have just landed on Planet X. You take out a ball of mass 100 g , release it

Question

You have just landed on Planet X. You take out a ball of mass 100 g , release it from rest from a height of 15.5 mand measure that it takes a time of 2.40 s to reach the ground. You can ignore any force on the ball from the atmosphere of the planet.

Part A

How much does the ball weigh on the surface of Planet X?

You have just landed on Planet X. You take out a ball of mass 100 g , release it from rest from a height of 15.5 mand measure that it takes a time of 2.40 s to reach the ground. You can ignore any force on the ball from the atmosphere of the planet.

Part A

How much does the ball weigh on the surface of Planet X?

Explanation / Answer

Given Mass=100g

Free fall time t= 2.40sec

height h= 15.5 m

so we need to find weight of the ball W= mg

here we dont know g value so we can obtain it by kinematics,

s = ut+1/2gt^2 ;

s dispalcement as height, u=0 initial velocity

15.5 = 1/2* g* (2.4)^2=> g=31/(5.76) = 5.381

so w = 0.1Kg * 5.381 = 0.538N

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