Question

Pose a real-life (only one) problematic situation, where you need mechanical physics to solve it. Situations similar to those we have been working on in previous activities (A1, A2, A3 and A4).

The problem must contain the following topics, without being limited to this list:

1. Conservation of Mechanical Energy

2. Conservation of linear or two-dimensional Moment.

3. Conservation of angular momentum.

Answer 1

1.

Conservation of Mechanical energy :-

for example of cars of mass m₁ and m₂ are traveling on a simple path,

say the speeds are V₁ > V_2, now if cars collide each other.

then the collision is completely elastic. so before KE = after KE

2.

for example cars having mass 3000 kg and 2000 kg are running with velocities 50 m/s and 40 m/s respectively.

Then the two cars collide each other and stick together as a single object.

Then find out the velocity of this combined car using conservation of linear momentum.

3 )

Suppose a car of mass 1499 kg is moving around a circle of radius 500 m.

The man driving the car has a mass of 70 kg and the other man sitting in the car has a mass of 60 kg.

During the driving, the other person jumps off the car. Then find out the new velocity of the car around the circle.