Question

The mass of a baseball is 145 grams. If it has a momentum of 5.8 kg m/s, how fast is it going?

Answer 1

Answer:

The baseball should have a speed of 40m/s.

Explanation:

The momentum p of an object of mass m and velocity v can be defined as $p=mv$.

The mass m is given to be 145 grams, which is equal to 0.145 kg.

The momentum is given to be 5.8 kg m/s.

From the above relation,

$v = \dfrac{p}{m}\\\\\\=\dfrac{5.8 kgm/s}{0.145 kg}\\\\=40 m/s.$