Question

a ball is thrown straight upwards into the air with an initial velocity of 20 metre per second how long will it take the ball to reach the height of 15 how fast will it then be going to take g=10 metre per second square​

Answer 1

Answer:

Correct option is

C

20 m

Initial velocity , u=20 m/s

Since, the ball is thrown upward, so 2nd equation of motion will be given by,

S=ut−

2

1

gt

2

⇒S=20×2−

2

1

×10×2

2

=40−20=20 m

Answer 2

Answer:

refer the attachment this is the answer