Question

What is the kinetic energy of a 145 g baseball moving at 42 m/s?

Answer 1

128J

Step-by-step explanation:

The correct answer is 128J

Answer 2

Answer:
Kinetic energy = 127.89 Joules

Step-by-step explanation:
Kinetic energy is calculated using the following rule:
KE = (1/2)*v* v^2
Where:
m is the mass = 145 g = 0.145 kg
v is the velocity = 42 m/sec

Substitute in the above equation to get the kinetic energy as follows:
KE = (0.5)(0.145)(42)^2
Kinetic energy = 127.89 Joules

Hope this helps :)