Question

find the work done by player in giving a speed of 10 m/s to a ball of mass 250 g.​

Answer 1

Answer:

12.5J

Explanation:

Given, initial speed of ball, u=0;

final speed of ball, v=10m/s;

mass of the ball, m=250g=(250/1000)kg

=0.25kg

Work done by the player on the ball,

W=changeinkineticenergy(E

k

)oftheball

or W=

2

1

mv

2

−

2

1

mu

2

=

2

1

(0.25)(10)

2

−

2

1

(0.25)(0)

2

=12.5J