Physics, 18.10.2019 22:20 zahinparvez69
Aperson throws a balloon straight down above level ground. the balloon bounces back up into the air. drag force is significant when the balloon is moving. verbally describe a free-body diagram for the balloon for each of the following times (you must include the force type, source, receiver, and direction for each force; relative magnitudes, when known, must be clear):
the balloon is being thrown down and is speeding up.
the balloon is in the air on its way down and is moving at constant speed.
the balloon has hit the ground and is instantaneously at rest as it reverses direction.
the balloon is in the air on its way back up and slowing down.
the balloon is in the air and is instantaneously at rest at the peak of its trajectory.
Answers: 3
Physics, 21.06.2019 21:00, jjxt126
A150 w lamp emits light of wavelength 590 nm uniformly in all directions. what is the photon flux (photons per unit area per unit time) on a small screen at a distance 2.3 m from the lamp? assume the photons are uniformly distributed over the surface of a sphere of radius 2.3 m.
Answers: 2
Physics, 21.06.2019 22:50, toddbecca9
Acar of mass m goes around a banked curve of radius r with speed v. if the road is frictionless due to ice, the car can still negotiate the curve if the horizontal component of the normal force on the car from the road is equal in magnitude to 101) a) mv2/r b) mg/2. d) mg e) tan[v2/(eg)]
Answers: 2
Physics, 22.06.2019 10:00, ceasar6071
Students design a model roller-coaster track. they place a rubber ball at the highest point on the track and let it go. the ball rolls along the track pulled only by the force of gravity. eventually, it comes to a stop. which change to the design will result in the ball moving the greatest distance?
Answers: 1
Aperson throws a balloon straight down above level ground. the balloon bounces back up into the air....
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