Question

Provide one example for each of the following concepts and explain how you can apply them in the real world now.

1） Simple kinematic equations

2）Principle of work and energy

3）Conservation of linear momentum

Answer 1

1) simple kinematics equations are

v=u+at

S=ut+1/2at²

v²-u²=2as

Where v is final velocity, u is initial velocity, t is time taken and s is distance traveled.

These are used when acceleration a is constant

Eg: When we throw a ball from ground with some velocity u , to calculate the max height reached ,time taken ,we use these formulas which is a real life example.

In projectile motion, we use these formulas to determine the range, time of flight etc .

In real world these are used in basket ball shooting , bullet shooting and many more.

2)work and energy principle is used to find the work done by a certain object and the energy certain object Carries.

In real world it's used in Dam to find the potential energy. Also it's used in industries to find the energy in various forms such as thermal, potential , kinetic ETC.

Using the conservation of energy ,the problem of work-energy is solved.

Eg. Energy required by the spring which is attached by a mass which is acting under the gravity.

3) Conservation is momentum is used in many ways.

To determine the recoil velocity of bullet, the velocity of two balls of different masses undergoing collisions etc.

In real world,the above examples also are included and in space when two asteroid collide they use this momentum conservation to find the final velocity of the asteroids after collision.