Physics Jeopardy. Work & Power. Simple Machines. energy. Energy. Extra credit on quiz questions. Q $100. Q $100. Q $100. Q $100. Q $100. Q $200. Q $200. Q $200. Q $200. Q $200. Q $300. Q $300. Q $300. Q $300. Q $300. Q $400. Q $400. Q $400. Q $400. Q $400. Q $500. Q $500.
Work & Power
Extra credit on quiz questions
Sam, who has a mass of 70Kg, races Jarvis, who has a mass of 50Kg, up a hill with a height of 10m. If Sam gets up the hill in 5s and Jarvis gets up the hill in 3.6s, who is more powerful?
The ratio of output force to input force of a simple machine is called the:
d) Mechanical advantage
How much less work does Jack do when he pulls a rope of a pulley down .7m and lifts a mass of 540N that is supported by 4 ropes?
The work on both sides are the same.
If Erin can only push with a force of 8N, how far out must she be from the fulcrum of the lever if she is lifting a mass with a weight of 40N that is 30cm from the fulcrum?
You build a lever to help you lift a tank. The tank weighs 4000 N, and you need to lift it 2 meters. You decide on a whim to analyze what you have done after lifting the tank and realize that you moved your end of the lever a whopping 20 meters, but had to apply a 500 N force. What did you find out the efficiency of your lever was?
80 % efficiency
How high does a 300N weight get lifted if it is supported by a system of 4 pulleys like the system below, and Mark pulls the rope .5m?
Potential energy is the energy an object has because of its ______.
If an object has kinetic energy, then it also must have _______.
A toy cart moves with a kinetic energy of 30J. If its speed is doubled, what will its kinetic energy be?
If Barbora, with mass of 46Kg jumps off the top of the high school, height: 20m, how much kinetic energy does she have when she has fallen a quarter of the distance?
A ball slides down the frictionless track shown below. The ball has no velocity at position F.
a)To what point does the ball rise on the opposite incline?
b)At what point(s) in the diagram is the speed at a maximum?
c)At what point(s) is the kinetic energy at a maximum?
d)At what point(s) is the speed zero?
e)At what point(s) is the potential energy at a minimum?
f)At what point(s) is the potential energy at a maximum?
g)At what point(s) is the momentum at a maximum?
d) F & E
f) F & E
If you stand on top of a building and figure out that you have a PE of 4000 Joules, what would your KE be right before you hit the ground?
KE = 4000 J
How much work does it take to lift a 400 N slab of brick a height of 5 meters?
W = 200 J
How much kinetic energy do you have if you are running at a speed of 5 m/s and have a mass of 65 kg?
KE = 812.5 J
What is your speed if you have a KE of 32000 J and a mass of 70 kg?
v = 30.2 m/s
What is your KE half way down a hill if the hill has a height of 25 m and you have a mass of 55 kg?
KE = 6875 J
Why will a looped coil attached to a DC power supply not work as a good motor?