Work
What is the SI unit for work?
Joules
What is the net work of the forces acting on an object equal to?
Kinetic Energy
How is power related to work?
Power is the rate that work is done
What does kinetic energy depend on?
The energy is due to the object's movement.
Speed and mass.
What is the equation for potential energy?
Mass x Free-fall acceleration x Height
What are the two ways that work can be calculated?
Force times distance
What are the equations for power?
Work/Time
Force x Velocity
What is the equation for kinetic energy?
1/2 x mass x velocity^2
Potential energy is associated with what characteristics of an object?
Position, shape, and condition
When is work done on an object?
When a force causes a displacement that is parallel
What is elastic potential energy?
Energy found in an elastic item when it returns back to its original state after being stretched or compressed?
Ms. Luna uses 50N of force to push the new lab equipment 15 meters into the classroom. How much work does she do?
750 Joules
A ball is raised 5.00 m in the air. If the ball has a mass of 1.5 kg, what is the gravitational potential energy?
73.8 Joules
The yearbook staff used 1000 Joules to move the new banner 15 meters. How much force did they use?
66.67 N
When a 4.00 kg mass is attached to a spring, the spring is stretched 0.35 m such that the mass is 0.70 m above the table. What is the spring's elastic potential energy if the spring constant is 25.0 N/m?
1.53 Joules