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A body of mass 500 g is thrown upwards w...

A body of mass 500 g is thrown upwards with a velocity `20 ms^-1` and reaches back to the surface of a planet after `20 sec`. Then the weight of the body on that planet is (Assume g to be constant) xN. Find x.

A

2 N

B

4 N

C

5 N

D

1 N

Text Solution

Verified by Experts

The correct Answer is:
D
`u=20m//s,m=0.5kg,t=20sec`
`S=ut+1/2gt^(2)`
`rArr0=20xx20-1/2gxx(20)^2rArrg=2m//s^2`
Weight = mg=`0.5xx2=1N`
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