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Joey, whose mass is 39kg, stands at rest at the outer edge of the frictionless 230kg merry-go-round, 2.2m from its center. The merry-go-round is also at rest. Joey then begins to run around the perimeter of the merry-go-round, finally reaching a constant speed, measured relative to the ground, of 5.0m/s .
What is the final angular speed of the merry-go-round?
A tuning fork vibrates at a frequency of 530 Hz. An out-of-tune piano string vibrates at 535 Hz. How much time separates successive beats
The label on a candy bar says 480 Calories. Assuming a typical efficiency for energy use by the body, if a 62 person were to use the energy in this candy bar to climb stairs, how high could she go?
The drive shaft AB of an automobile is to be designed as a thin-walled tube. The engine delivers 125 kW when the shaft is turning at 1500 rev/min. Determine the minimum thickness of the shaft's wall
The deepest point in the ocean is in the Mariana Trench, about 11 km deep, in the Pacific. The density of seawater at the surface is 1.03 X 10^3 kg/m^3. Find its density at the bottom
Megan's mass is 28kg. She climbs the 4.8m ladder of a slide and reaches a velocity of 3.2m/s at the bottom of the slide. How much work was done by friction on Megan? Assume that air resistance is negligible.
A machine that makes transformers can only wind the coils with a single specific number density. what is length of the output coil
q1.a grinding wheel initially at rest is rotated with constant angular acceleration of 3.73 rads2 for 9.03 s. the wheel
work function of potassium is 2.225 eV. Find the cutoff wave length of potassium, find the frequency of the x-ray
A 5.00 g bullet traveling horizontally at 460 m/s is shot through a 2.00 kg wood block suspended on a string 3.00 m long. find the speed of the bullet as it emerges from the block
An airplane is making a turn with a given radius in a circle. The lift force (given) is exerted perpendicular to the wings. What is the angle that the wings make with the horizontal
A goalkeeper kicks a ball of mass 400 g in the air, which reaches a position of height 15.9 m above the ground corresponding to a horizontal distance 19.7 m from its initial position. What is the total work done on the ball
questiona mass m 90 kg slides on a frictionless track that has a drop follow by a loop-the-loop with radius r 15.1 m
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