A baseball has a mass of about 155 g. What is the magnitude of the momentum of a baseball thrown at a speed of 87 miles per hour? (Note that you need to convert mass to kilograms and speed to meters/second. A mile is 1.6 kilometers or 1600 meters.)

5.994 kgm/s

Explanation:

Momentum: This can be defined as the product of the mass of a body to the velocity of that body. The S. I unit of momentum is kgm/s.

Mathematically, momentum can be expressed as,

M = mv ... Equation 1

Where M = momentum of the baseball, m = mass of the baseball, v = velocity of the baseball.

Given: m = 155 g = (155/1000) kg = 0.155 kg. v = 87 miles per hour = 87 (1600/3600) m/s = 38.67 m/s.

Substituting into equation 1

M = 0.155 (38.67)

M = 5.994 kgm/s.

Thus the momentum of the baseball = 5.994 kgm/s