Question

a body of mass 50 g is thrown vertically upward, it's initial velocity is 40 m/s . take g as 9.8 m/s2.calculate it's kinetic energy before hitting the ground, it's maximum potential energy​

Answer 1

Initial Velocity u=40

Fianl velocity v=0

Height, s=?

By third equation of motion

v2−u2=2gs

0−402=−2×10×s

s=20160

⇒s=80m/s

Toatl distance travelled by stone = upward distance + downwars distance =2×s=160m

Total Diaplacement =0, Since the initial and final point is same.