Posted by **Thakgalo sakwana** on Monday, February 7, 2011 at 12:45pm.

An object is projected vertically upwards and returns to the point of projection 12s later. Ignore air resistance and determine the velocity with which it was projected?

- Physical science -
**Thakgalo sakwana**, Monday, August 1, 2011 at 3:50am
Vf=Vi +at

Vf=0, Vi=?, a=-9.8 remeber time taken to go up is equal to the time taken to go back to the point of projectile.. THEREFORE t=6

Vf=Vi +at

(0)=Vi +(-9.8)(6)

Vi=58.8m/s

***[OR]***

Vf=Vi +at

Vf=-Vi, Vi=?, a=-9.8, t=12

(-Vi)=Vi +(-9.8)(12)

-2Vi= -117.6

Vi=58.8m/s

if u've any question call 0723624826

- Physical science -
**Erick**, Monday, April 22, 2013 at 11:08am
It corect

## Answer This Question

## Related Questions

- calculus - a mass m is projected vertically upward with an initial velocity u. ...
- Science - A stone projected vertically upwards with a velocity of 20m/s. Two ...
- physics - An object is projected vertically upwards with a velocity of 28m/s. ...
- physics - a body is projected with velocity v1 from a point a at the same time ...
- Physics - A stone is projected vertically upwards with velocity 40 m/s. Show ...
- physics - A stone is projected vertically upwards with velocity 40m/show that ...
- physics - An object of mass 4.3 kg is projected into the air at a 45° angle. It ...
- Physics - An object of mass 4.40 kg is projected into the air at a 55 degre ...
- physics - A particle is projected vertically upwards with velocity of u.after t ...
- science - a particle is projected vertically upward with the velocity u m/s and ...

More Related Questions