Question

b) If the object is
dropped from a building of height 50m. what will be its velocity
while it is crossing through 20m and also find its velocity while it is
reaching the ground?

Answer 1

Answer:

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Answer 2

Answer:

Taking upward direction to be positive.

Initial velocity u=20 m/s

Acceleration a=−g=−10 m/s

2

Displacement S=−25 m

Using v

2

−u

2

=2aS

Or v

2

−(20)

2

=2(−10)(−25)

∴ v

2

−400=500

Or v=

900

=30 m/s

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Thank you and have a nice day