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Q. A 50 kg child stands at the rim of a merry-go-round of radius 2 m, rotating with an angular speed of 3 rad/s. (1) what is the child's centripetal acceleration? (2) What is the minimum force between his feet and the floor of the carousel that is necessary to keep him in the circular path? (3) What minimum coefficient of static friction is required? Is the reply you found reasonable? In other words, is he probable to stay on the merry-go-round?
Determine the eccentricity of the orbit of Uranus
Two lightweight rods 24 {rm cm} in length are mounted perpendicular to an axle and at 180 ^circ to each other. At the end of each rod is a 480 {rm g} mass. The rods are spaced 42 {rm cm} apart along an axle. The axle rotates at 4.90 rad/s.
A 4.5kg dog stands on an 18 kg flatboat at distance D = 6.10m from the shore. It walks 2.4 m along the boat toward shore and then stops. Assuming no friction between the boat and the water, find how far the dog is then from the shore.
Calculate change in kinetic energy
Classically, the electron cannot pass through the barrier because E
A charge of +1 coulombs is placed at the 0 cm mark of a meter stick. A charge of +4 coulombs is placed at the 100 cm mark of the similar meter stick.
What is the time of oscillation of block
On a very muddy football field, a 100 linebacker tackles a 75 halfback. Immediately before the collision, the linebacker is slipping with a velocity of 8.9 north's and the halfback is sliding with a velocity of 7.9 east's.
Two vectors A and B have the similar magnitude of 100 N (they represent forces of equal strength). What is the magnitude of the resultant vector of A and B if they are parallel and pointing in opposite directions.
David is driving a steady 28.0m/s while he passes Tina, who is sitting in her car at rest. Tina begins to accelerate at a steady 2.70 at the instant when David passes. How far does Tina drive before passing David.
Calculate the rates of solar heating
Two freight cars, each with a mass of 2.9 x 10^5 kg, collide and stick together. One was initially moving at 2.80 m/s and the other was at rest. What is the final speed.
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