Question

A pitcher throws a 0.14 kg baseball with an initial velocity of 30 m/s. What is the kinetic energy of the baseball?

a) 63 J
b) 105 J
c) 126 J
d) 315 J

Answer 1

The kinetic energy of a 0.14 kg baseball thrown with a velocity of 30 m/s is calculated to be 63 Joules using the kinetic energy formula KE = (1/2)mv².

Step-by-step explanation:

The kinetic energy (KE) of an object can be calculated using the formula KE = (1/2)mv², where m is the mass of the object in kilograms and v is the velocity in meters per second. For the baseball being thrown by a pitcher with a mass of 0.14 kg and an initial velocity of 30 m/s, we can use this formula to find the kinetic energy.

KE = (1/2) × 0.14 kg × (30 m/s)² = (0.07) × 900 = 63 J

So the kinetic energy of the baseball is 63 Joules.