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Q. In a popular amusement park ride, a rotating cylinder of radius 4.00 m is set in rotation at an angular speed of 6.00 rad/s. The floor then drops away, leaving the riders suspended against the wall in a vertical position. What minimum coefficient of friction between a rider's clothing and the wall is needed to keep the rider from slipping? (Hint: Recall that the magnitude of the maximum force of static friction is equal to µn, where n is the normal force - in this case, the force causing the centripetal acceleration.)
A cue ball hits a stationary eight ball on a pool table. For which of the following systems is there a change in momentum during the collision? define why.
A uniform plank of length 5.40 m and weight 217 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support. To what distance x can a person who weighs 417 N walk on the overhanging part of the plank before it immedia..
Assume air resistance is negligible; from what height (in cm) above the compressed spring was the block dropped.
Dan is gliding on his skateboard at 2.0 m/s. He suddenly jumps backward off the skateboard, kicking the skateboard forward at 8.0 m/s. How fast is Dan going as his feet hit the ground? Dan's mass is 60 kg and the skateboard's mass is 5.0 kg.
A 130- baseball, moving along the axis with speed 35 , strikes a fence at a 45 angle and rebounds along axis with unchanged speed Give the - and - components of its change in momentum.
Two pipes of equal length are each open at one end. Each has the fundamental frequency of 500 Hz at 325 K. In one pipe the air temperature is increased to 330 K. If the two pipes are sounded together, what beat frequency results.
A car travelling at 37 {rm m/s} runs out of gas while travelling up a 7.0{rm ^ {circ}} slope. How far would it coast before starting to roll back down.
A loudspeaker on a tall pole broadcasts sound waves equally in all directions. If the sound output is 7.0 W, at what distance from loudspeaker is the sound intensity level 85.7 dB.
A simple harmonic oscillator consists of a block of mass 2.2kg attached to a spring of spring constant 26N/m. When t = 1.60 s, the position and velocity of the block are x = 0.128m and v = 3.170 m/s. (a) What is the amplitude of the oscillations? ..
A 160 m wide river flows due east at a uniform speed of 4.05 m/s. A boat with a speed of 7.2 m/s relative to the water leaves the south bank pointed in a direction 39o west of north. What is (a) magnitude and (b) direction of the boat's velocity r..
A luge and its rider, with a total mass of 104 kg, emerges from a downhill track onto a horizontal straight track with the initial speed of 53 m/s. suppose they stop with the constant deceleration of 2.30 m/s2.
Monochromatic light from a distant source is incident on a slit 0.750 {rm mm} wide. On a screen 2.00 {rm m} away, the distance from the central maximum of the diffraction pattern to the first least amount is measured to be 1.35 {rm mm}.
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