Question

Trying out for the big leagues, you throw a 149 gram baseball at a speed of 85.0 miles per hour. What is the ball's kinetic energy (j) ?

Answer 1

Answer:

K.E=107.56J

Explanation:

Given data

v=85 miles/hour

convert it to meter per second we get

v=37.9984 meter/second

m (baseball mass)=149 gram

convert it to Kg we get

m=0.149 kg

K.E (Kinetic Energy)=?

Solution

$K.E=\frac{1}{2}mv^{2}\\ K.E=\frac{1}{2} *(0.149)* (37.9984)^{2}\\ K.E=107.56J$