Question

A pitcher throws a .145kg ball at a velocity of 30.0 m/s. How much kinetic energy does the ball have

Answer 1

Mass given = 0.145 kg

Velocity = 30.0 m/s

Now , we know ,

Kinetic energy = 1/2 mass × (velocity)^2

=> K.E. = 1/2 × 0.145 × (30)^2

=> K.E. = 65.25 J .

Answer : Kinetic energy of the ball is 65.25 J .

Answer 2

Answer:65.25 J

Explanation: Kinetic energy is given by.

E = 1/2 x m x v^2

E = 1/2 x 0.145 x 30 x 30

E = 65.25