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1) What is the new angular speed?
2) Find the change in kinetic energy of the block.
3) How much work was done in pulling the cord? A small block on a frictionless, horizontal surface has a mass of 2.50x10-2kg .
It is attached to a massless cord passing through a hole in the surface (the figure ). The block is originally revolving at a distance of 0.300 m from the hole with an angular speed of 1.65rad/s . The cord is then pulled from below, shortening the radius of the circle in which the block revolves to 0.150 m. Model the block as a particle.
Assume a typical hummingbird has a lifespan of 4.00 years and an average heart rate of 1300 beats per minute. Compute the number of times a hummingbird's heart beats in its life, and express it in scientific notation. Make use of 365.24 days per y..
The oscillation of rod OA about O is defined by the relation (? = 4/p)(sin pt), where ? and t are expressed in radians and seconds, respectively. Collar B slides along the rod so that its distance from O is r = 10 / (t + 6), where r and t are expr..
A 5 kg mass attached to a horizontal spring is pulled from its equilibrium position by 3 m and let go. what is the maximum velocity of the mass
Three resistors of 40 ohms, 60 ohms and 100 ohms connected on a close circuit with 200 Volt source (assume ideal circuit). With Resistors connected in Parallel: determine the voltage drop across each resistor
Two identical pith balls are hung by insulating strings, touching each other, as in the picture below. The mass of each ball is 0.002kg. Determine the charge on each ball
Suppose the solenoid filled with a paramagnetic substance such as liquid oxygen. Qualitatively,how will this change your your answer to Part (b)? Will your reply increase, decrease,or remain the same.
A long string of tension T and mass density η is attached to a small sphere of mass m. What is the displacement of the string on the right side of the mass
A solid, uniform ball roll without slipping up a hill as shown. Initially, at the bottom of the hill, the ball has a linear speed of 25.0 m/s. How far from the foot of the cliff does the ball land
What is the magnitude of displacement
A sport utility vehicle (SUV) and a sports car travel around the same horizontal curve. The SUV has a static stability factor of 0.74, At what maximum speed can the sports car negotiate the curve without rolling over
A circular solenoid contains 100 turns of wire and carries a current of 2 amps. Calculate the magnetic flux through one turn of the wire making the solenoid
A 10.0 kg object oscillates at the end of a vertical spring that has a spring constant of 1.90 104 N/m. Calculate the frequency of the dampened oscillation
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