Question

An object is thrown vertically upward with an initial speed of 25 m/s from the ground. What is the height of the object 1.0 s before it touches the ground?

Answer 1

Answer:

hope it helps

Explanation:

Gravitic acceleration at the earth’s surface is about 9.8m/s^2. Neglecting air friction, consider that what’s going to happen between throw and ground contact is that the ball’s velocity is going to be changed by 50 m/s (The initial 25 m/s will decelerate to zero at the apex of the throw, and then build back to 25 m/s downward). So the answer is 50 m/sec / 9.8 m/sec^2, or about 5.1 seconds.

Answer 2

Answer:

Explanation:

1/2mv^2 = mgh

1/2*625= 10*h

H=625/20

H=31.25 m