Physics, 19.05.2021 16:00 hannahcolleen4895
You lift a 6.5-kg backpack from a chair that is 0.47 m above the floor (hc) to a desk that is 0.75 m above the floor (hd).
a. When the backpack is on the desk, what is the backpack-Earth system’s gravitational potential energy relative to the floor (GPE1)?
b. When the backpack is on the desk, what is the backpack-Earth system’s gravitational potential energy relative to the chair (GPE2)?
c. How much work was done by gravity as you lifted the backpack from the chair to the desk?
Answers: 2
Physics, 22.06.2019 03:30, natu2072
Using a wheel and axle, a farmer is trying to lift a bucket of water from the bottom of a well. the larger wheel has a radius of 40 cm compared to the axle that has a radius of 10 cm. if a bucket of water is 50 n, then how much effort is required to raise it? 12.5 n 200 n 2 n 500 n
Answers: 1
Physics, 23.06.2019 07:00, xbeatdroperzx
The minute hand of a clock is 7cm long. calculate the displacement and distance covered by it from 8 am to 8.30 am pls answer fast i will surely mark as brainliest fast fast fast
Answers: 2
You lift a 6.5-kg backpack from a chair that is 0.47 m above the floor (hc) to a desk that is 0.75 m...
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