Question

Which equation would best help solve the following problem?

Rita hits a tennis ball with an initial velocity of 15 meters/sec. When she hits the ball, it is one meter above the ground. How long will it take for the ball to hit the ground?

A.
4.9t2 + 15t + 1 = 0

B.
–16t2+ 15t + 1 = 0

C.
–4.9t2 + 15t = 1

D.
–4.9t2 + 15t + 1 = 0

Answer 1

@Hero

Answer 2

@.Sam.

Answer 3

use
h = ut + gt^2 / 2
h = 1m, u = 15 and g = -9.8.
so -4.9 t^2 + 15t = 1

Answer 4

@Preetha

Answer 5

C

Answer 6

thank you