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Gayle runs at a speed of 8.00 m/s and dives on a sled, initially at rest on the top of a frictionless, snow-covered hill, that has a vertical drop of 23.0 m. After she has descended a vertical distance of 3.00 m, her brother, who is initially at rest, hops on her back, and they continue down the hill together.
(a) What is the speed of the sled just after the brother jumps on?
(b) What is their speed at the bottom of the hill?
An object of mass 5 kg is moving with a momentum of 50 kg m/s. What is the objects speed? What is the objects kinetic energy
assume the roller coaster (h1 = 32 m, h2 = 11 m, h3 = 20) passes point A with a speed of 3.50 m/s. If the average force of friction is equal to one fifth of its weight, with what speed will it reach point B? The distance traveled is 30m.
Charge Q = 17E-8 C is placed in the origin. Location A is -3.00m from the charge while location B is 2.00m from the charge. A) Find the potential difference VB - VA between the two points. B) Which point is at the higher potential? Type either "Po..
Two equally charged particles each have a mass of 0.015kg. They are suspended by a light string with a 60 degree angle between them. find the magnitude of the repulsive electric force
They are 15.0 m above a fire-fighters safety net. When landing jumper stretches the net 1.0 m before coming to rest. A. what was the average acceleration experienced by the jumper when slowed to rest by the net? B. Is this acceleration positive or ne..
In order to clearly read a book 24 cm away, a farsighted girl needs an image to be 35 cm from her eyes. What focal length is necessary for lens in her eyeglasses.
Two equally charged insulating balls each weigh 0.50 g and hang from a common point by identical threads 30 cm long, What is the magnitude of the charge on each ball
Quarks carry spin 1/2. Three quarks bind together to make a baryon (such as the proton or neutron); two quarks (or more precisely a quark and an anti-quark) bind together to make a meson (for example the pion or the kaon). Suppose the quarks are i..
A proton traveling 3.0 E 6 m/s enters half way in a capacitor and travels 2.00 E -3 meters before crashing into the bottom plate, What is the voltage applied to the capacitor from the battery
If the rope tension is 120 N, and if the rope does 2500 J of work on the box, what angle theta does the rope make with the horizontal
Jack and John are standing 6m apart from each other playing soccer. Jack kicks the ball to John and John kicks it back immediately. find the speed of the ball when it's kicked back to Jack
Calculate the period of a satellite orbiting the Moon, 94km above the Moon's surface. Ignore effects of the Earth
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