Work
Unit for work
What is Joules?
Thermal energy that is transferred by touching something.
conduction
A bicycle tire is an example of
wheel and axle
Which will have more potential energy
A. A 100 lb person on a mountain
B. A 100 lb person at the beach
A. A 100 lb person on a mountain
Kinetic and Potential energy are this type of energy
Mechanical
The formula for calculating work
W= F x d
Force x distance
Thermal energy moves from
A. Hot to cold
B. Cold to hot
A. Hot to cold
A slide is an example of an
inclined plane
The formula to calculate Kinetic Energy is
1/2mv2
Energy that travels in waves or rays
Electromagnetic
Amy uses 20N of force to push a lawn mower 10 meters. How much work does she do?
200 Joules
The sun heats the earth through this type of heat transfer
radiation
An inclined plane wrapped around a pole is a
Screw
Acceleration due to gravity is
9.8 m/s2
Chernobyl power plant produced this type of energy
Nuclear
Alex applies 350 N of force to move his stalled car 40 m, how much work did Alex do?
14,000 Joules
Convection
What is the formula for mechanical advantage?
Output/input
What is the Kinetic Energy of a 150 kg object that is moving with a speed of 15 m/s?
KE = 16875 J
Moving electrons make this type of energy
Electrical
Angela uses a force of 25 Newtons to lift her grocery bag while doing 50 Joules of work. How far did she lift the grocery bags?
2 meters
When pouring hot and cold water together, which will go to the top before mixing?
Hot
A see saw is this type of lever
1st class
Roger Federer’s tennis ball has a mass of 0.3 kg. If he holds the ball above the ground at a height of 2.0 m to serve, what is its gravitational potential energy (GPE)?
6.0 J
Microwaves cook food by using this type of energy
Electromagnetic