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Q. A m1 = 14.50 kg object and a m2 = 10.00 kg object are suspended, joined by a cord that passes over a pulley with a radius of 10.00 cm and a mass of 3kg .The cord has a negligible mass and does not slip on the pulley. The pulley rotates on its axis without friction. The objects start from rest 3 m apart. Treating the pulley as a uniform disk, find out the speeds of the two objects as they pass each other.
On a workday an average decibel level of the busy street is 89 dB, with 100 cars passing a given point every minute. If the number of cars is reduced to 30 every minute on a weekend, what is the decibel level of street.
A basketball player grabbing a rebound jumps 73.3 cm vertically. How much total time (ascent and descent) does the player spend (a) in the top 13.1 cm of this jump and (b) in the bottom 13.1 cm? Do your results explain why such players seem to han..
The electricity received at an electric substation has a potential difference of 2.80 10^5V. If the requires output is 440V, what must be the ratio of the turns of the step-down transformation.
What was the initial negative charge on one of the spheres, and what was the initial positive charge on the other? (Hint: Use charge conservation and solve for one of the initial charges. You would end up with a quadratic equation. The solutions g..
Find out the magnitude of the charge on the moving particle. The baby soon learns to bounce with utmost amplitude and minimum effort by bending her knees at what frequency.
find the minimum thickness for constructive interference of visible light with a wavelength of 595 nm.
A 13 turn circular loop of wire has a diameter of 0.66m. The plane of the circular loop creates an angle of 63 to the Earth's magnetic field. In 0.15s the coil is flipped at a location where the magnitude of the Earth's magnetic field is 34 μT.
A merry-go-round starts from rest and accelerates uniformly over 23.5 s to the final angular velocity of 6.55 rev/min.
A 55 kg person is riding in a hot air balloon and scale shows this person's weight too be 549N. the acceleration of gravity at the location of the balloon is known to be 9.79 m/s/s.
An "energy bar" contains 21g of carbohydrates. If the energy bar was his only fuel, how far could a 68 kg person walk at 5km/hr? Express your answer using two significant figures.
A mass of 1.62 kg stretches a vertical spring 0.328 m. If the spring is stretched an additional 0.136 m and released, how long does it take to reach the (new) equilibrium position again.
Two students are on a balcony 18.30 m above the street. One student throws a ball, b1, vertically downward at 16.80 m/s. At the same instant, the other student throws a ball, b2, vertically upward at the same speed.
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