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A straight ladder is leaning against the wall of a house. Theladder has rails 4.40 m long,joined by rungs 4.500 m long. Its bottom end is on solid but sloping ground so that the top ofthe ladder is 4.100 m to theleft of where it should be, and the ladder is unsafe to climb. Youwant to put a rock under one foot of the ladder to compensate forthe slope of the ground.
(a) What should be the thicknessof the flat rock?
A student throws a set of keys vertically upward to his fraternity brother, who is in a window 3.60 m above. The brother's outstretched hand catches the keys 1.20 s later.
Your beighbor has a cute Bichon-Frise puppy. assume air is 80% Nitrogen and 20% Oxygen, how many grams of air does the tire contain
What is the net force exerted on the skier, assuming his acceleration is constant.
Xu is a new material discovered by a TA. The specific heat C and latent heat L of Xu are measured by heating up a piece of Xu sample. The temperature T (in K) of Xu sample varying as a function of heat Q (in 103 J) transferred to it.
An object of mass m1 = 2.10 kg placed on a frictionless, Draw free-body diagrams of both objects, This answer has not been graded yet
Two force vectors point in opposite directions and have the same magnitude. If their magnitudes are 36.5 Newton’s, then what is the magnitude of their sum?
A fire hose ejects a stream of water at an angle of 31.20° above the horizontal. The water leaves the nozzle with a speed of 24.50 m/s. assume that the water behaves like a projectile, how far from a building should the fire hose be located to hit..
Two parallel plates are held at potentials of +229V and ?59V, An electron is initially placed halfway between the plates, Find its kinetic energy when it hits the positive plate
A woman on a bridge 71.0 m high sees a raft floating at a constant speed on the river below. She drops a stone from rest in an attempt to hit the raft. The stone is released when the raft has 6.60 m more to travel before passing under the bridge. ..
n object of mass "m" specific heat "Cp" & surface area "As" is initially at a temperature "To". Rate of Heat gained by Object = Rate of Heat Lost by Gas m, Cp, h, A & Tg are all constants.
An object is held up by two ropes. rope 1 makes an angle of 65 degrees above horizontal and the tension in it is T1 = 26N. rope 2 makes an angle of 32 degrees above horizontal and the object is in equilibrium. what is the tension in rope 2 (T2) an..
What is least amount of work required by an external force
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