Question

An object is thrown vertically upwards and rises to height of 20m. Calculate

(i) The velocity with which the object was thrown upwards.

(ii) The time taken by the object to reach the highest point​

Answer 1

Answer:

u= 20 m/s

t=20 s

Explanation:

h= 20

v2+u2= 2as

v2=u2+2gh

0=u2+2x-10×20

u2=400

u = 20 m / s

v=u +gt

0=20 -10×t

t=2s