Topics and Formula/s (WORK AND MECHANICAL ENERGY)

a. W = Fd W = Fdcoso b. ME = PE +KE PE = mgh KE = 1/2mv^2

Work

The product of a force ACTING ON AN OBJECT and its resulting displacement.

W=Fd​

The equation for work if parallel to each other

W=Fd​cos0

The equation for work if they are not parallel to each other or work done

Okay

NOTE!!!!! F is force, d is displacement, 0 is the angle BETWEEN force and distance

positive or negative

Work is a scalar quantity and can also be ________ or ________

positive

Work is ___________ if the force or its component doing the work is applied in the SAME DIRECTION as the displacement

negative

Work is ___________ if the force or its component doing the work is applied in the OPPOSITE DIRECTION as the displacement

Energy

It is the ability/capacity to do work

Joules/Ergs

Energy is also expressed in ___________________

Chemical, Electrical, Nuclear, Sound, Lights, Mechanical

Six different forms of ENERGY

potential;kinetic; PE+KEMechanical Energy is the sum of ____________ energy and ____________ energy, therefore, the formula is ME = ____ _ ____

Potential

The energy at rest

Kinetic

The energy in motion

PE=mass x gravity x height

Formula for POTENTIAL ENERGY

KE=1/2 x mass x velocity^2

Formula for KINETIC ENERGY

Force Constant

The force needed to produce a UNIT ELONGATION or COMPRESSION of a spring

K = F/x

Formula for FORCE CONSTANT

Gravitational;Elastic spring

Two common examples of a CONSERVATIVE FORCE

Gravitational Potential

The associated potential energy conservative force has

Elastic spring force

Elastic potential energy

dissipative/non conservative force

The opposite of conservative force is called?

Friction

A common example of a dissipative/non conservative force