# Work Energy and power Work Energy and power

• Slides: 46

Work , Energy and power

Work , Energy and power

Scalar product

Work done by variable force

Numerical

Kinetic Energy

Work-Energy Theorem

Potential Energy

Conservative and Non-conservative force

Conservation of Mechanical Energy

Potential Energy of a Spring

Potential Energy of a Spring

Potential Energy of a Spring

Numerical

Various Forms of Energy

Various Forms of Energy

Various Forms of Energy

Various Forms of Energy

Mass –Energy Relation

Power

Power

Collisions

Collision in one dimension

Collision in one dimension

Collisions in one dimensions

Collisions in one dimension

Completely inelastic collision

Numerical

Collisions in two dimensions

Collisions in two dimensions

Collisions in two dimensions

• Example: Two balls initially travelling along the xaxis with opposite velocities collide with each other obliquely, is it possible that they will move in the y-axis after collision? • Solution: Yes, it is possible, if the balls have same mass and travel with same speed. Initially their total momentum in x-direction was zero as their velocities were opposite; also in y-direction it is zero because they do not have velocity in that direction. Now after collision if their velocities are still equal and in opposite direction, the total momentum still remains zero.

ASSIGNMENTS

ASSIGNMENTS

ASSIGNMENTS

ASSIGNMENTS

ASSIGNMENTS

NUMERICAL PROBLEMS

Numerical problems

Numerical problems

Numerical problems

Numerical problems

Assignments