Question

potential energy and kinetic energy
b. Derive the formula for the kinetic
energy of an object of mass m,​

Answer 1

Answer:

Potential Energy and Kinetic Energy :

Potential energy (PE) is stored energy due to position or state

ex:

a raised hammer has PE due to gravity.

fuel and explosives have Chemical PE

a coiled spring or a drawn bow also have PE due to their state

Kinetic energy (KE) is energy of motion

ex:

A moving car has a lot of kinetic energy

Gravitational Potential Energy :

When the PE is due to an objects height then:

PE due to gravity = m g h

Where:

m is the objects mass (kg)

g is the "gravitational field strength" of 9.8 m/s2 near the Earth's surface

h is height (m)

Kinetic Energy :

The formula is:

KE = ½ m v2

Where

m is the object's mass (kg)

v is the object's speed (m/s)

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