Question

A 4kg ball is dropped from a heught of 15 m from the floor, what is the kinetic energy when it strikes the floor? Use conservation of energy

Answer 1

What kind of energy do you think the ball has before it's dropped?

Answer 2

first find P.E throw mgh

Answer 3

mgh=P.E

Answer 4

4*9.8*15

Answer 5

(4)(15)(10)=600 take g=10m/s^2

Answer 6

for accurate value g=9.8m/s^2
(4)(15)9.8=closer to 600m/s

Answer 7

as total energy remains conserved so at max height all energy equal to P.E and K.E=0 and at closer to ground all energy is K.E and P.E=0 but total energy remain same
so your .K.E will also be (4)15)(9.8)=?

Answer 8

588 J ?

Answer 9

yes

Answer 10

thank you :)