146k views
5 votes
A ball with a mass of 0.5 kg is thrown vertically upward with a speed of 415 m/s what are its speed and direction two seconds later?

User Lxknvlk
by
6.7k points

1 Answer

1 vote

Answer:


v=395\;\;m/s in upward direction.

Step-by-step explanation:

Given,

Mass of ball
m=0.5\;kg

Initial speed
u=415\;m/s

time
t=2\;second

Acceleration
a=-g=-9.8\;m/s^2

By the Newton's 1st equation,


v=u+at\\v=415-9.8*2\\v=395\;\;m/s

The final velocity is positive, it means the direction of final velocity is upward.

User Jglatre
by
7.0k points