Question

Assertion: According to law of conservation of machainical energy change in potential energy is equal and opposite to the change in kinetic energy
Reason: Mechanical energy is not a conserved quantity.
A. If both assertion and reason are true and reason is a true explanation of assertion.
B. If both assertion and reason are true but reason is not the correct explanation of assertion.
C. If assertion is true but reason is false.
D. If both assertion is and reason are false.

Answer 1

For conservative force the state of kinetic and potential energies at point remain constant throughout the motion This is knoen as law of coneservitive of metanical energy According to this law,
Kinetic energy + potential energy = constant
or `Delta E+ Delta U = 0 or Delta K+ Delta U`