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☆☆☆☆☆Cards in this guide (12)
Which of these changes as the momentum of an object changes
Mass
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
This scientist first published a document that stated that every particle in the universe is attracted to every other particle with a force that is directly proportional to the product of their masses
sir Issac newton
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
An American satellite with a mass of 20000 kg is 40 meters from an enemy satellite with a mass of 15000 kg What is the gravitational force between them
1.25 x 10^-5?
Two identical metal balls weighing 490 N each are suspended with their centers 3 meters apart what is the gravitational force between them
1.85 x10^-8 n
A ball is thrown horizontally from a cliff at a speed of 15 ms and strikes the ground 45 meters from the base of the cliff How high was the cliff rounded to the nearest meter
Answer: 44 meters
What does the amount of force times the time applied equal
impulse
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 player kicks a soccer ball from ground level and sends it flying at an angle of 30 degrees at a speed of 26 ms
Yes your question is.......................
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