1.

A Ball is dropped from the window which is 8 metre above the ground the initial velocity of ball was 4 metre per second find the time which it take to reach the ground​?

Answer»

Answer:

0.92 seconds

Explanation:

Given :

  • Initial velocity = u = 4 m/s

  • Acceleration due to gravity = a = 10 m/s²

To find :

Using the second equation of motion :

S=ut+½×at²

8=4×t+½×10×t²

8=4t+5t²

5t²+4t-8=0

By SOLVING the above quadratic equation, T = 0.92 seconds

The time taken to reach the ground is 0.o2 seconds



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