Question

A child drops a ball from a height of 10 m. Assume that its velocity increases uniformly at the rate of 10m/s2. Find the velocity and time for

Answer 1

Explanation:

a) u = 0m/s

a = 10m/s²

s = 10m

v²-u² = 2as

v² - 0² = 2×10×10

v² = 200

v = √200

v = 10√2

v = 14.14m/s

b) v-u = at

t = (v-u)/a

t = (14.14-0)/10

t = √2

t = 1.414sec

Answer 2

Answer:

Use v2=u2+2as

v2=0+2 * 10* 10

v= 10 ?2 m/s

Then use V=u+at

10?2=0+10* t

t= ?2 sec.