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work

a force acting upon an object to cause a displacement. (key words: force, displacement, and cause)

work=force*distance

Formula for work

Power

(physics) the rate of doing work

watts

the unit of measure for power is _______

Power=work/time

Formula for Power

Potential Energy

(mass) x (g) x (height)

elastic potential energy

a stretched bungee cord

gravitational potential energy

an icicle hanging from a rooftop

mass and height

GPE depends on what?

GPE

mass*acceleration of gravity*height

mass and velocity

Kinetic Energy depends on what?

1/2*mass*velocity2

What is the Formula for Kinetic Energy?

Energy

(physics) the capacity of a physical system to do work

Chemical energy

the stored energy of particles in matter that can be released when the particles react to form a new substance

electromagnetic energy

a camera flash

electrical energy

a power line

Mechanical Energy

Potential - energy associated with the motion or position of an object

sound energy

a clap of thunder

thermal energy

a hot coffee mug

Nuclear energy

Potential - the energy stored in the nucleus of an atom

steering wheel

Wheel and axel

Pulleys

are wheel and axels with a groove around a wheel were a rope fits in

Inclined Plane

A flat surface set at an angle or an incline with no moving parts that is able to lift objects by pushing or pulling the load.

Wedges

two inclined planes joined back to back

Screw

A simple machine that is an inclined plane wrapped around a central cylinder to form a spiral

Lever (1)

Fulcrum is in middle and load and effort are on one side

Lever (2)

Fulcrum is at end load is in middle

Lever (3)

fulcrum at end effort in middle

GPE= M x G x H

The formula for calculating potential energy is_______.

Joules

Potential energy is measured in units of_______.

9.8 m/s (2)

Gravitational pull must be measured in units of_______

mass

a body of coherent matter, usually of indefinite shape and often of considerable size

GPE=mgh

Calculate the potential energy of a rock with a mass of 55 kg while sitting on a cliff that is 27 m high.

Eg=196 J

What distance is a book from the floor if the book contains 196 Joules of potential energy and a mass of 5 kg?

M= ?

An automobile is sitting on a hill which is 20 m higher than ground level. Find the mass of the automobile if it contains 362,600 J of potential energy.

kinetic

Energy of motion

½ m v²

The formula for calculating kinetic energy is_______

mass (kg)

The two factors that determine the amount of kinetic energy in an object are_______and_______.

kg.

Mass must be measured in units of_______

m/s

A car enters the freeway with a speed of 6.4 m/s and accelerates uniformly for 3.2 km in 3.5 minutes. How fast (in m/s) is the car moving after this time? (units)

KE= ½ m v²

Calculate the kinetic energy of a truck that has a mass of 2900 kg and is moving at 55 m/s

Ek= ½ m v²

How fast is ball rolling if it contains 98 J of kinetic energy and has a mass of 4 kg.