Question

a body is projected horizontally with a speed 30 metre per second from a very high tower what will be its speed after 4 seconds

Answer 1

please tell me whether correct

Answer 2

Heya in the question you can see there is no horizontal force acting on the particle or the body so the horizontal acceleration will be zero so the initial velocity of horizontal component will be the same so lets see vertical component of force so here gravitational acceleration of earth is acting which is equal to 9. 8 m/s²so by applying Newton's equation for motion V=U-atand putting the value of you is equal to 30 m/s² G is equal to 9. 8 m/s²and t is equal to 4 you can find out the answer and the final velocity V= -9.2m/s