Answer:
7.51
Explanation:
The mass of the bat is given to us as:
m
=
0.277 kg
,
and its initial velocity is:
v
i =
4.25 m/s
When the velocity is doubled, the new value becomes:
v
f
=
4.25
m/s
×
2
=
8.5
m/s
.
The formula for kinetic energy is:
K
=
1
2
m
v
2
.
The change in kinetic energy is:
Δ
K
=
1
/2(
m
)
(
v2
f
−
v
2
i
)
=
1
2
(
0.277)
10-2.5=7.5J
7.51 J
.
The bat gained 7.51 joules.
