Question

A ball is thrown vertically upwards with a velocity of 98 metre per second find the maximum height to which it Rises and the total time it takes to return to earth surface​

Answer 1

Answer:

Explanation:

a = - g m/s²

v = 0

s = h

v² = u² + 2as

0 = (98)² - 2 × 9.8 × h

h = 490m

v = u + at

0 = 98 - 9.8t

t = 10 second

total time = 2t

               = 2×10

               = 20 second

Answer 2

Answer:

As we knows - v^2=u^2 -2gh

(0) ^2 -u^2 -2gh

u^2=2gh

( 98) ^2= 2*9.8*h

98*98:-2*9.8=h

h= 98*98*10:-2*98

h=98*5 =490

v-u +gt

(0) ^2= 98+(-9.8) *t

98=9.8t

t=98:-9.8

t=10 sec

TOTAL TIME =10+10=20Sec