Work
Work or No work:
A person lifts a bag of groceries into their car
What is "Work"
Define Power
What is "The rate at which work is done OR energy is transferred"
The energy of moving objects
What is "Kinetic Energy"
How much gravitational potential energy is stored in a 2.0 kilogram cat perched on a 2.0 meter high ledge?
What is 39.2 Joules?
How much kinetic energy does 0.036 kilogram ball have when it rolls with a speed of 2.3 m/s across the floor?
What is 0.095 Joules?
Work or No Work:
A person pushes a shopping cart through the store
What is "Work"
What requires more power? Walking or Running up the stairs?
What is "Running up the Stairs"
The stored energy in objects due to position
What is "Potential Energy"
How much Elastic Potential Energy is stored in a spring that is stretched 0.20 meters and has a spring constant of 45 N/m?
What is 0.9 Joules?
How much kinetic energy does a 1000-kg car have when it travels at 25 m/s (56 mph)?
What is 310,000 Joules? (312,500 J)
Work or No Work:
A person holds a bag of groceries for 5 minutes
What is "no work"
A light bulb converts 120 joules of electrical energy into light every 2.0 seconds, what is the power rating of the light bulb?
What is 60 Watts?
Energy stored due to stretching or compression
What is "Elastic Potential Energy"
How high would a 1.5 kilogram book need to be placed in order for it to have 80 joules of gravitational potential energy?
What is 5.4 meters high?
What is 5.0 Kilograms?
Work or No Work:
A person pushes a stalled car, but it does not move.
What is "No Work"
How much time does it take a 746 Watt electrical engine to convert 250 Joules of energy into mechanical energy?
What is 0.34 seconds
A rock sitting precariously on a high cliff
What is gravitational potential energy
What is 1.74 N of force?
If a 500 kilogram boat travels a distance of 150 meters every 20 seconds. What is the kinetic energy of the boat?
What is 14,000 Joules? (14062.5 J)
A box with a mass of 5.0 kilograms is dragged 4.0 meters across the floor with a force of 25 N. The force is applied at a 5.0 degree angle to the horizontal. How much work is done on the box?
What is 99.6 Joules (I'll take 100 J also)
*Nm (Newton meters) is also an acceptable unit.
How much power is required to lift a 40 N object straight up to a height of 3.0 meters if done in 5.0 seconds?
What is 24 Watts?
A roller coaster going over the top of a medium sized hill at 30 m/s has what kind of energy(s)?
What is Gravitational Potential and Kinetic Energy?
A spring has 3.2 Joules of energy stored in it. If the spring has a spring constant of 100 N/m, how far was the spring stretched (or compressed)?
What is 0.25 meters?
A roller coaster has a total kinetic energy of 800,000 J at it's maximum velocity. If the roller coaster has a mass of 1500 kg, what is the velocity?
What is 33 m/s? (32.66 m/s)