Question

A body of 5kg raised to 2m find the work do​

Answer 1

Work against the gravity will be PE=mgh=5×10×10=500J

Total work done by the external force is W=Fd=170×10=1700J

so the kinetic energy gain will be KE=W−PE=1700J−500J=1200J

if the velocity becomes v then

2

1

mv

2

=1200Joule

or velocity v=

5

2400

=21.9m/s

Answer 2

Answer:

Given,

Mass of the object=5kg

Height attained=2m

Acceleration due to gravity=10m/s^2

(9.8m/s^2)

Work done=FS

Work done=mgh(Since F can also be written as mg)

Work done=5×10×2

Work done=100J

HOPE IT HELPS YOU DEAR..........

WITH LOVE,ARCHANA :-)