Potential Energy
Potential Energy is also known as the energy of what?
Position
Kinetic Energy is also known as the energy of what?
Motion
0 N
The work done on an object depends on what two things?
Force applied and distance
True or False, in the absence of air resistance, any two objects will fall at the same rate?
True
What is the equation for Gravitational Potential Energy?
PE = m*g*h
What is the equation for Kinetic Energy?
KE = 1/2*m*v2
One fixed pulley does not change the force required to lift an object but it does change what?
The angle/ direction of lift
How can I calculate Force given Work and Distance?
Divide Work by Distance
This is the value of gravity's acceleration.
9.8 m/s2
Decreasing an objects height off the ground does what to its gravitational potential energy?
Decreases
A car sits at the top of a hill with a potential energy of 780 J. Assuming no friction, what will its kinetic energy be as it rolls to the bottom of the hill?
780 J
Adding one movable pulley to a fixed 1 pulley system does what to the output force? (nothing, doubles, triples, quadruples)
How far can you push an object using 2 J of work while applying a force of 1 N?
The unit for velocity is...
m/s (meters per second)
Doubling an objects mass does what to its potential energy?
Doubles
True or false, electrical energy is a form of kinetic energy?
True
Adding more pulleys decreases the input force but does what to the input distance?
Increases
A 2kg book falls off the top of a 1m bookshelf. How much work is required to lift the book back to its original position?
19.6 J
Mass is measured in kg while weight is measured in what?
Newtons
What is one other form of potential energy that is not affected by gravity?
Nuclear
Stored Mechanical
Which has the higher KE, an object twice as heavy or an object moving twice as fast?
Twice as fast
True or False, pulleys decrease the amount of work required to lift an object.
False it only decreases the force.
The work done will be zero if the angle between the force and distance is what?
90 degrees