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The balance wheel of a watch oscillates with an angular amplitude of n-rad and a period of 0.10 s.
1) Find the maximum angular speed of the wheel.
2) Find the angular speed of the wheel when its displacement is n/2 rad.
3) Find the angular acceleration of the wheel when its displacement is n/4 rad.
A 800kg , light-weight helicopter ascends from the ground with an acceleration of 3.50m/s2. What is the work done by the net force on the helicopter?
The altitude of this luge track is 2237m. The altitude at the end is 2205 m. If a luger takes 48 seconds to complete a run, what is his average vertical velocity
Consider a gas of fermions at temperature T=0 in 3D space with dispersion law E(p) = v lpl^3 where v is a constant. calculate the Fermi energy and the ground energy
An underwater diver sees the sun 50 degrees above horizontal. How high is the sun above the horizon to a fisherman in a boat above the driver.
At what average rate does the force from the cable. A falling skydiver has a mass of 54.5 kg. What is the magnitude of the skydiver's acceleration when the upward force of air resistance has the magnitude that is equal to one-fourth of his weight.
A cart loaded with bricks has a total mass of 21.2 kg and is pulled at constant speed by a rope. The rope is inclined at 27.2 ? above the horizontal and the cart moves 27.1 m on a horizontal floor. The coefficient of kinetic friction between groun..
A speedy tortoise can run at 0.01 meters per second and a hare can run 21 times as fast. In a race they both start at the same time; however the hare stops to rest for 1.50 minutes. So the tortoise wins by a shell (20 cm).
What is the coefficient of kinetic friction between sled and incline? (Enter 0 if sled does not move.)
a ball is thrown upward from the roof of a building, passes the roof going down three seconds later, how fast did the ball strike the ground
In a TV picture, faint, slightly offset ghost images are formed when the signal from the transmitter travels to the receiver both directly, what is the difference in the distance traveled by the two signals
In one day, a 85 kg mountain climber ascends from the 1440 m level on a vertical cliff to the top at 2360 m . The next day, she descends from the top to the base of the cliff, which is at an elevation of 1310 m
Length A is measured to be 7.5cm±0.3 cm and length B is 7.0cm±0.6cm. What is the difference between the two lengths, LB - LA
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