Question

A handball player hit a ball with a mass of 0.25 kg. The ball travels at a velocity of 15 m/s for 0.75 s until it hits the wall.

What was the average acceleration of the handball?

A.
0.05 m/s²

B.
0.05 m/s

C.
20m/s

D.
20 m/s²

Answer 1

when velocity is constant accel is zero, after hitting the ball will come in rest so now vel is zero and so accel will be change in vel / time

Answer 2

D

Answer 3

thanks, when do i use m/s^2 or m/s?

Answer 4

units of vel is m/s and for accel its m/s^2

Answer 5

ok, thanks.

Answer 6

anytime (:

Answer 7

A football player kicks a ball with a mass of 0.42 kg. The average acceleration of the football was 14.8 m/s².

How much force did the kicker supply to the football?

Answer 8

do i divide?

Answer 9

F=ma
so multiply

Answer 10

right! 35.24N?

Answer 11

do that again...

Answer 12

35.24 m/s^2 ?

Answer 13

14.8*0.42= 6.216

Answer 14

yea, sorry, I was reading the wrong choices , 6.216N?

Answer 15

yeah

Answer 16

thnx so much!

Answer 17

no prob