A. 2.5s
B. 5.0s
C. 10.0s
D. 15.0s
E. 20.0s

Correct Answer:

Option C = 10.0s

Explanation

Time to move up:

V = U – gt
0 = 50 – 10t
t = 5.

Total time spent on air = 2t = 10.0s

SEE ALSO  Ice of mass 50g at 0°C was completely melted by 70% of the total heat energy supplied. Calculate the total heat energy supplied [Specific latent heat of fusion of ice = 336Jg−1]

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