Asoftball, of mass m = 0.195 kg, is pitched at a speed v0 = 25.3 m/s. due to air resistance, by the time it reaches home plate it has slowed by 11.9%. the distance between the plate and the pitcher is d = 13.7 m. calculate the average force of air resistance, fair, that is exerted on the ball during its movement from the pitcher to the plate.

Explanation:

To give this problem a solution, it is necessary to use the kinematic equations. The equation that describes velocity as a function of acceleration is given by,

Since there is a loss of 11.9%, in the final speed, that is to say that of the total speed, only 88.1% is the effective one, so

Re-arrange to find a,

Applying Newton's second law we have now that

b. false

explanation:

suppose a rock in free fall is dropped off a cliff. after falling for 5 seconds, its speed would not be 100 m/s.