Question

Two ice hockey players are skating. The first has a mass of 87kg and is skating at a constant speed of 2.6 m/s. The second skater has a mass of 78kg. How fast does the second skater have to be in order to have a momentum similar to the first skater ?

Answer 1

2.9m/s

Step-by-step explanation:

Given parameters:

Mass 1 = 87kg

Speed 1 = 2.6m/s

Mass 2 = 78kg

Unknown:

Speed 2 = ?

Solution:

Momentum is the amount of motion a body possesses.

Momentum = mass x velocity

Momentum of skater 1 = Momentum of skater 2

So;

87 x 2.6 = 78 x speed 2

Speed 2 = 2.9m/s