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1. A rectangular block twice as high as it is wide is resting on a board. The coefficient of static friction between board and incline is .63. If the board is tilted will the block first tip over or begin sliding?
2. A uniform pole of mass M is at rest on an incline of angle secured by a horizontal rope. For what angle does the situation require the greatest coefficient of friction.
A 30 g steel ball bounces elastically on a steel plate, always returning to the same maximum height h = 14.2 m. What is the weight of the ball
A factory worker accidentally releases a 200 kg crate that was being held at rest at the top of a ramp that is 3.9 m long, How fast is the crate moving as it reaches the bottom of the ramp
A flea is able to jump straight up about 0.38 meter. It has been said that if a flea were as big as a human, it would be able to jump over a 100 story building! Find how high would this superflea be able to jump
Light comes in from air at 3x 108m/sec at 700nm N1=1.00 then it is a new material and slows to 1.5 x 108 m/sec. What is the index of refraction of the material
Two straight rods 60 centimeter long and 2 millimeter apart in a current balance carry currents of 18 Amp each in opposite directions. Find what mass must be located on the upper rod to balance the magnetic force of repulsion
A highway is to be built between two towns, one of which lies 36.0 km south and 88.0 km west of the other. What is the shortest length of highway that can be built between the two towns, and at what angle would this highway be directed? length km..
A 3.9kg ball with a velocity of 3.2m/s in the +x-direction collides head-on elastically with a stationary 1.5kg ball. What is the speed of the first ball after the collision
An amateur astronomer decides to build a telescope from a discarded pair of eyeglasses. One of the lenses has a refractive power of 11 diopters, How far apart should the lenses be separated
A bungee jumper falls for 1.3 s before the bungee cord beginsto stretch. How far below the diving platform is the jumper at that moment
The electron gun in an old TV picture tube accelerates electrons between two parallel plates 1.2cm apart with a 28kV potential difference between them. What is the electric field strength between the plates
A rainbow trout is an extremely cautious fish constantly monitoring the surface of the stream looking for both food and predators. A trout escapes immediately, once noticing something suspicious, like a fisherman caring his fishing gears.
A satellite is in a circular orbit around the Earth at an altitude of 1.68 106 m. Find the acceleration of the satellite
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