Physics, 12.11.2019 00:31 christinaruckepegvlp
Consider three scenarios in which a particular box moves downward under the pull of gravity :
(a) in scenario a, the box falls straight down from an initial height h to the ground under the influence of gravity.
(b) in scenario b, the same box, starting from the same initial height, h, slides down to the ground along a frictionless ramp that makes an angle of 30° with the horizontal.
(c) in scenario c, the same box, starting from the same initial height, h, slides down to the ground along a rough ramp with friction that makes an angle of 30° with the horizontal.
let w a gravity be the work done by gravity on the box in scenario a, let wb gravity be the work done by gravity on the box in scenario b, and let wc gravity be the work done by gravity on the box in scenario c.
which of the following is true? select the correct
1. o wa, gravity > wb, gravity > wc, gravity
2.o wc, gravity > wb, gravity > wa, gravity
3.o wb, gravity > wc, gravity > wa, gravity
4.o wa, gravity > wc, gravity > wb; gravity
Answers: 3
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The temperature in gavin's oven is a sinusoidal function of time. gavin sets his oven so that it has a maximum temperature of 280°f and a minimum temperature of 240°. once the temperature hits 280°, it takes 20 minutes before it is 280° again. gavin's cake needs to be in the oven for 30 minutes at temperatures at or above 270°. he puts the cake into the oven when it is at 260° and rising. how long will gavin need to leave the cake in the oven? (round your answer to the nearest minute.)
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Consider three scenarios in which a particular box moves downward under the pull of gravity :
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