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A 24-kg boy stands 1 m from the center of a frictionless playground merry-go-round, which has a moment of inertia of 218 kg m2. The boy begins to run in a circular path with a speed of 0.6 m/s relative to the ground.
(a) Calculate the angular velocity of the merry-go-round.
(b) Calculate the speed of the boy relative to the surface of the merry-go-round.
A stamp collector uses a lens with 7.5-cm focal length as a simple magnifier. The virtual image is produced at the normal near point (25 cm). What is the expected angular magnification
In a women's 100-m race, accelerating uniformly, Laura takes 1.81 s and Healan 3.06 s to attain their maximum speeds, which they each maintain for the rest of the race.
A horizontal beam of vertically polarized light of intensity 43 W/m2 is sent through two polarizing sheets. What is the intensity of the light transmitted by the pair of sheets
Two resistors, 50.0 ? and 52.0 ?, are connected in parallel. The current through the second resistor is 2.10 A. What is the total power supplied to the two resistors
It was a dark and stormy night, when suddenly you saw a flash of lightning. how far away was the lightning bolt
What is the diameter of an air-filled coil with a 44 mH inductance, if it has 290 turns and the length of the coil is 76 cm
A 5.7kg box is on a frictionless 44° slope and is connected via a massless string over a massless, find the tension in the string once the box begins to move
"A plane, diving with constant speed at an angle of 54.0 degrees with the vertical, releases a projectile at an altitude of 770m. what is the speed of a aircraft
Only two forces act on an object (mass = 3.30 kg), as in the drawing. (F = 79.0 N.) Find the magnitude and direction (relative to the x axis) of the acceleration of the object
A charge of 6.53mC is placed at each corner of a square .470 m on a side. Determine the direction of the force on each charge
A 800kg , light-weight helicopter ascends from the ground with an acceleration of 3.50m/s2. What is the work done by the gravitational force
You're driving down the highway late one night at 17 {rm m}/{rm s} when a deer steps onto the road 45 {rm m} in front of you. Your reaction time before stepping on the brakes is 0.50 {rm s} and the maximum deceleration of your car is 12 {rm m/s^2}..
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