Question

A stone is projected horizontally with 20m/s from top of tall building. Calculate it's position and velocity after 3 sec .

Answer 1

Hey!!Mate

Here is your Answer,

Answer:

54m/s

Explanation:

Since, body is projected horizontally with a velocity of 20m/s.

ux = 20m/s

ax = 0

So, vx = 20m/s for all time.

Along vertical axis,

uy = 0

t = 5

ay = 10m/s2

vy =?

vy = uy +ayt

=> vy = 0 + 10*5= 50m/s

So, magnitude of velocity of body after 5s

√{(50)²+(20)²}m/s

=√2900 m/s

=53.851 m/s

= 54 m/s (approx) 

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I hope this wil help you❤️❤️