Physics, 17.12.2019 19:31, yasmincastor
Ashopper in a supermarket pushes a cart with a force of 35ndirected at an angle of 25 degree below the horizontal. the forceis just sufficient to overcome various frictional forces, so thecart moves at constant speed.
(a) find the work done by the shopper as she moves down a 50.0mlength aisle.
(b) what is the net work done on the cart? why?
(c) the shopper goes down the next aisle, pushing horizontally andmaintaining the same speed as before. if the work don't byfrictional force doesn't chance, would the shopper's applied forcebe larger, smaller, or the same? what about the work done on thecart by the shopper?
Answers: 3
Physics, 21.06.2019 22:50, peno211
Moon effect. some people believe that the moon controls their activities. if the moon moves from being directly on the opposite side of earth from you to being directly overhead, by what percentage does (a) the moon's gravitational pull on you increase and (b) your weight (as measured on a scale) decrease? assume that the earth–moon (center-to-center) distance is 3.82 × 10^8 m, earth's radius is 6.37 × 10^6 m, moon's mass is 7.36 × 10^22 kg, and earth's mass is 5.98 × 10^24 kg.
Answers: 2
Physics, 22.06.2019 18:30, ptrlvn01
Two 2.0-cm-diameter disks face each other, 1.0 mm apart. they are charged to ±10 nc. what is the electric field strength between the disks? a proton is shot from the negative disk toward the positive disk. what launch speed must the proton have to just barely reach the positive disk?
Answers: 1
Physics, 22.06.2019 18:50, naiomireyes74p2aybs
What accounts for an increase in the temperature of a gas that is kept at constant volume? a. energy has been removed as heat from the gas. b. energy has been added as heat to the gas. c. energy has been removed as work done by the gas. d. energy has been added as work done by the gas.
Answers: 2
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