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Q1. On the Wheel of Fortune game show, a solid wheel (of radius 6.7 m and mass 10 kg) is given an initial counter clockwise angular velocity of +1.26 rad/s. It after that smoothly slows down and stops after rotating through 3/4 of a turn.
Find out the frictional torque that acts to stop the wheel.
Q2. A 140 g block hangs from a spring with spring constant 8.0 N/m. At t=0 s the block is 16 cm below the equilibrium point and moving upward with a speed of 89 cm/s. What is the block's oscillation frequency? What is the block's distance from equilibrium as the speed are 36 cm/s? What is block's position at t=1.0 s?
Ultrasound probes can resolve structural details with sizes approximately equal to the wavelength of an ultrasound waves themselves. What is a size of the smallest feature observable in human tissue while examined with 25 MHz ultrasound? The speed of..
A 89.0 kg skydiver hanging from a parachute bounces up and down with a period of 1.50 s. What is the new period of oscillation when a second skydiver
Phil is standing on a third floor balcony, 10m above the ground. Where does the ball hit the ground
A brick is thrown vertically upward with an initial speed of 4.90 m/s from the roof of a building. If the building is 98 m tall, how much time passes before brick lands on the ground.
The model airplane in figure below is flying at a speed of 19 m/s on a horizontal circle of radius 17 m, What is the net work done on the plane
A stretched cord has a fundamental frequency of 144 Hz, a length of .9 m, and a mass of 2 g. What is the tension on the cord
A box starts from rest and is pushed a distance d = 1.25 meters along a frictionless ramp by a horizontal force, Fa, in 9.75 seconds. find the acceleration of the box as it slides up the ramp
Lightning occurs when there is a flow of electric charge (principally electrons) between the ground and a thundercloud. How much charge flows between the ground and the cloud
A parallel-plate capacitor is constructed with circular plates of radius 6.5×10?2 m . The plates are separated by 0.21 mm, find the value of the dielectric constant
A 2.30-kg object attached to a spring moves without friction (b = 0) and is driven by an external force given by the expression F = 3.40sin(2?t), Find the resonance angular frequency of the system
A 0.32 kg body undergoes simple harmonic motion of amplitude 9.1 cm and period 0.40 s. What is the magnitude of the maximum force acting on it
The density of ice is 917 kg/m3, and the density of sea water is 1025 kg/m3. What is the weight of the heaviest bear that the ice can support without sinking completely beneath the water
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