a ball of 250 gm is dropped from the height of 20m. calculate its kinetic energy when the ball covers the distance equal to 4/5th of the height . also find time to cover the distance? Please Want Urgent Answer Please
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Answered by
1
Answer:
It will take 4 hrs to cover the range
Answered by
1
Distance (s) =20 m
Initial velocity =0 m/s
g=10 m/s
2
By using the formula:
v
2
=u
2
+2as
v
2
=0
2
+2×10×20
v
2
=400
v
2
=
400
v=20m/s
For calculating time:
V=u+at
20=0+10×t
t=
10
20
t=2 sec
The the stone will hit the ground with a velocity of 20 m/s in sec.
Initial velocity =0 m/s
g=10 m/s
2
By using the formula:
v
2
=u
2
+2as
v
2
=0
2
+2×10×20
v
2
=400
v
2
=
400
v=20m/s
For calculating time:
V=u+at
20=0+10×t
t=
10
20
t=2 sec
The the stone will hit the ground with a velocity of 20 m/s in sec.
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