Question

EXERCISE 2: conservation of momentum
Answer the problems using the concept of conservation of momentum.
Show you complete solution.
1. Two ice skaters stand together. They "push off” and travel directly away from each
other, the boy with a velocity of +1.50m/s. If the boy weighs 735.0N and the girl is 490.0
N, what is the girl's velocity after they push off? (Consider the ice to be frictionless).
2. Two ice skaters stand together. They "push off” and travel directly away from each
other, the boy with a velocity of +0.50m/s and the girl with a velocity of -0.65m/s. If the
mass of the boy is 60.0kg, what is the girl's mass? (Consider the ice to be frictionless).​

Answer 1

Answer:

Explanation: conservation refers to something which doesn't change. This means that the variable in an equation which represents a conserved quantity is constant over time. It has the same value both before and after an event.

There are many conserved quantities in physics. They are often remarkably useful for making predictions in what would otherwise be very complicated situations. In mechanics, there are three fundamental quantities which are conserved. These are momentum, energy, and angular momentum. Conservation of momentum is mostly used for describing collisions between objects.