Physics, 29.06.2019 18:40 andrewrangel63
Suppose you wish to compare the work done by pushing a box on rollers up a ramp to the work done if you lift the box straight up to the same final height. a. what work is required to lift a 100n box (about 22 lbs) up to a table which is 1 m off the floor? b. let’s assume you also have a ramp available that makes an angle of 30° with the horizontal, as shown in the fig- ure to the right. the ramp is 2 m long. the weight of the box (100 n) is due to the earth pulling on the box. this 100 n is a force directed straight down. if you push it up a ramp, you are doing work against only the component of this weight along the ramp, which is 50 n, as shown in the diagram. how much work does it require to push the box up the ramp, assuming no friction? 30° c. which situation (pushing up the ramp or lifting straight up) requires more work? d. which situation requires more force? e. for which situation is the distance moved greater? f. what is the change in the gravitational potential energy of the box for each situation? g. whatadvantage, ifany, istheretousingtheramp? explain.
Answers: 2
Physics, 21.06.2019 19:30
A500g object falls off a cliff and losers 100 j from its gravitational potential energy store. if the gravitational field strength g=9.8n/kg, how high is the cliff?
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Physics, 22.06.2019 09:30
Which of these is not a possible type of energy transformation? a. electrical energy into light energy b. sound energy into nuclear energy c. potential energy into kinetic energy d. kinetic energy into mechanical energy
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Physics, 22.06.2019 11:00
Although longitudinal waves can travel through all media types what is the disadvantage of this type of wave transmission? a) he efficiency of he wave transmission is greatly diminished as the media becomes less dense b) the oscillation of one set of particles has a huge impact on neighboring particles c) particles become too close together as they bump into each other making it more likely to hit other particles down the line
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Physics, 22.06.2019 11:30
Which of the following is the phase that results when the moon is on the opposite side of the earth from the sun? a. quarter moon b. crescent moon c. new moon d. full moon
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Suppose you wish to compare the work done by pushing a box on rollers up a ramp to the work done if...
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