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☆☆☆☆☆Cards in this guide (16)
Four students are moving 80 N boxes from the floor to a shelf 4 meters high Student A moves 8 boxes in 10 minutes Student B moves 6 boxes in 8 minutes Student C moves 4 boxes in 6 minutes and st
student A
How much heat energy is needed to convert 50 kg of water at 80 degrees Celsius to steam at 100 degrees Celsius
117,180,000
A man is carrying cement blocks weighing 200 newtons up a ladder to a platform 7 meters above the ground He has been carrying 2 blocks per minute How much work is done in 10 minutes
28,000 J
A hammer is used to pull a nail from a piece of wood How could the hammer be modified to make the task easier
Make The Handle Longer
A bicycle is an example of what machine
A bicycle is an example of a complex machine, consisting of interacting simple machines.
A man and a woman exert a total of 900 N by pushing a car 20 meters across the street The man exerts twice as much force as the woman How much work does the man do
The man exerts a force of 600 N and the woman exerts a force of 300 N. Work done by the man = Force x displacement = 600 x 20 = 12,000 J Hence, the man performs 12,000 joules of work.
What factor prevents a machine from operating at 100 percent efficiency
Friction((:
A 14 kg cart is coasting down a street at a steady speed of 7 ms what is the kinetic energy of the cart
Kinetic energy = 1/2 M V2 = 0.5 x 14 x 49 = 343 joules
A rock weighing 98 newtons is pushed off the edge of a bridge 50 meters above the ground What was the potential energy of the rock before it began to fall
4900
A ramp is 30 meters long and 5 meters high 200 newtons of force must be applied by the mover to push a 1000 newton piano up the ramp
What is the amount of work accomplished by the ramp? - 5000 joules
What is the amount of work done by the mover? - 6000 joules
What is the efficiency of the ramp? - 83%
How much heat energy would it take to melt a 20 kg block of lead that was at 24 degrees Celsius
1,277,800 j
This term is the center of interest for an artwork
Focal Point for my A+ buddies ;p
How many joules of work are done when a 20 newton box is lifted 5 meters off of the floor
100
A pulley system is used to lift a 2000 newton engine up a distance of 3 meters The operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor To lift the engine fi
250 newtons
A+ Answers
A pulley system is used to lift a 2000 newton engine up a distance of 3 meters The operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor. value of fo
What is the value of fo?
2000 newtons
What would be the final temperature if you mixed a liter of 30 degrees celsius water with 1 liters of 50 degrees celsius water
40 degrees
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