Temperature and Volume for a Gas

B) Kinetic Energy - the energy an object possesses due to its' motion

Newton mistakenly believed that the
kinetic energy of a moving body was
directly related to its velocity.

KE,V have a ....

Direct Square Relationship

Equation

KE = (½)mv²

Relationships

KE/m

Direct

KE = (½)mv²

KE/v?

Direct Square

Ex 1) A 60.0-kg runner has 1920 joules of kinetic energy.

At what speed is she running?

Ex) A 60.0-kg runner has 1920 joules of kinetic energy.

At what speed is she running?

KE = (½)mv²

m = 60.0 kg
KE = 1920 J

V = ?

1920 J=(1/2)60.0kgV²

64.0 = V²

V = 8.00 m/s

Summary W, K E, PE

K.E. - equivalent to work needed to get
an object to a certain
speed
or to stop it.

P.E. - Equivalent to work needed to get an object to where it is or into its present condition.( spring)

W = Fd = ΔPE

If W = 40 J

Then ...

ΔPE = 40 J