Question

a stone is dropped from the top of a tower of height 50m its velocity after falling through a distance 20 is ________​

Answer 1

Answer:

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Answer 2

examples for ur answer

Correct option is

D

20ms

−1

Here ,

u = Initial velocity = 0

v = Final velocity

s = Distance travelled = 20m

a = acceleration = g = 10ms

−2

Now , we know that from the equation of motion that ,

v

2

=u

2

+2as

v=

u

2

+2as

v=

0+2×10×20

v=

400

ms

−1

v=20ms

−1