Question

A volley ball is thrown straight upward on the moon with an initial speed of 30 m/s; calculate its velocity 20s after it is thrown?

Answer 1

Answer:

V=I-it

V=30-10×20=-170

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Explanation:

Answer 2

V=u+at
U=30m/s
T=20s
a=-g(moon)=g(earth)/6=(-10)/6

S=ut +(1/2)at^2
Thus substituting all values we will get s=266.66
V^2-u^2 = 2as
From this eq. V=sqroot(u^2+2as)
Thus we will get v= 3.33m/s