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A pesky rabbit has been feeding on Mrs. Cromwell's prized flowers. In order to put an end to this she devised the simple trap below to catch the rabbit. The crate weighs 13lb and is supported by stick BC. Find the minimum diameter of stick BC if the normal stress in it is limited to 100 psi.
Since the circumference of a circle of radius r is 2p r, every time the center of mass moves a distance 2p r, the object rotates a full circle (2p radians). If this happens in a time T then. Combine these equations to find out an expression for ..
Consider a uniformly solid hemisphere of radius R and mass M. Determine the center of mass. Determine the principal axes and principal moments of inertia.
You are taking a photograph of a poster on the wall of your dorm room, therefore you can't back away any farther than 2.0 meter to take the shot. Find the longest focal length lens that will work
A 75.0 kg bungee jumper, tied to a 39.0 m longcord, leaps off a bridge whose deck is 69.0 m above thewater. He falls to 7.0 m above the water before the bungeecord pulls him back up. What is the magnitude of the impulseexerted on the bungee jumper..
A light ray enters a rectangular block of plastic at an angle of θ1 = 45.0o and emerges at an angle of θ2 = 76.0o. Determine the index of refraction for the plastic
An 8.57-kg block slides with an initial speed of 1.64 m/s up a ramp inclined at an angle of 27.3° with the horizontal. Use energy conservation to find the distance the block slides before coming to rest
A space vehicle is traveling at 4150 km/h relative to the Earth when the exhausted rocket motor is disengaged, What is the speed (km/h) of the command module relative to Earth after the separation
Suppose in a situation like m1 = 200g were at the 20-cm position and m2 = 100g at the 65-cm position. Would there be a problem in experimentally balancing an equilibrium system with m3 = 50g? Explain. If so, how might the problem be resolved?
Assume a planet is a uniform sphere of radius R that (somehow) has a narrow radial tunnel through its center. Also assume we can position an apple anywhere along the tunnel or outside the sphere. Let FR be the magnitude of the gravitational force ..
A rock appears to lie just 38 cm below the surface of a smooth stream when viewed from above the surface of the stream. what is the actual distance of the rock below the surface
A 10 cm radius coil of wire is hooked up to a variable current source that produces a time-varying magnetic field of magnitude B(t)=100(t-0.02t2) near the center of the coil. A secondary 1000 turn coil of radius 1 cm is placed adjacent to the firs..
An 250 kg air hockey puck is tied to a peg. The puck is given a push and moves around the peg at a constant speed in a circle. What is the acceleration of the puck
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