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A solid, uniform, spherical boulder (I=2/5 MR^2) starts from rest and rolls down a hill. The top 1/4 of the hill is rough enough to cause the boulder to roll without slipping, but the lower 3/4 is covered with ice and there is no friction. The translational speed of the boulder when it reaches the bottom of the hill is 20.0m/s. How high is the hill?
Two crickets, Chirpy and Milada, jump from the top of a vertical cliff. Chirpy just drops and reaches the ground in 4.00s, How far from the base of the cliff will Milada hit the ground
q1. what is the smallest thickness of a soap film n1.47 that will appear black if illuminated with 490 nm light?
Two coils have the same number of circular turns and carry the same current. Each rotates in a magnetic field acting perpendicularly to its axis of rotation, What is the radius (in cm) of coil 2
A river 98.2 m wide flows toward the south at 35.8 m/min. A girl on the west bank wishes to reach the east bank in the least possible time. How far downstream does she travel
The ball sinks to the point where none of it extends out of the water and remains submerged such that the child does not sink. The child has a mass of 36 kg. What is the diameter of the ball? Suppose for this problem that the ball has negligible m..
What is the dissimilarity between sprinters and nonathletes
A cardinal (Richmondena cardinalis) of mass 3.80×10-2 kg and a baseball of mass 0.146 kg have the same kinetic energy. What is the ratio of the cardinal's magnitude p_c of momentum to magnitude p_b of the baseball's momentum.
Consider a system consisting of two long, concentric solenoids. The larger solenoid has current running in counter clockwise fashion. Find the magnetic field strength inbetween the solenoids. positive number if it is up
Sam pushes a 10.0-kg sack of bread flour on a frictionless horizontal surface with a constant horizontal force of 4.0 N starting from rest. What is the speed of the sack after Sam has pushed it a distance of 20 cm
An elevator moves downward in a tall building at a constant speed of 4.35 m/s. Estimate the highest floor from which the bolt can fall
A 4.00-kg particle moves along the x axis. Its position varies with time according to x = 3.0t + 2.0t^2 where x is in meters and t is in seconds. Find the acceleration of the particle
A person scuffing her feet on a wool rug on a dry day accumulates a net charge of -42 µC. by how much does her mass increase
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