A baseball pitcher throws a 250g baseball to make it accelerate to 50m/s the instant it leave his hand how much energy (in joules) is expended (how much work is done ) if that same baseball travels a distance of 30 meters
To calculate the work done by the pitcher in accelerating the baseball, we can use the equation:
Work = (1/2) * mass * velocity^2
First, we need to convert the mass of the baseball from grams to kilograms:
mass = 250g = 0.25kg
Now we can calculate the work done:
Work = (1/2) * 0.25kg * (50m/s)^2
= (1/2) * 0.25kg * 2500m^2/s^2
= 0.5 * 0.25kg * 2500m^2/s^2
= 312.5 Joules
Therefore, the energy expended or the work done by the pitcher is 312.5 Joules.