1.

If a ball projected vertically upward 8 meters then find the work done by gravity​

Answer»

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The equation is given as v

2

−u

2

=2as.

where,

v = FINAL velocity,

u = initial velocity,

a = acceleration due to gravity, 10m/s

2

,

s = h = HEIGHT traveled.

Therefore, we can find u with above info. In this CASE, v = 0 at the top of the path.

0−u

2

=2×10×5=10m/s.

Hence, the initial velocity of the ball was 10 m/s.



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