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Q1. In a skating stunt called as "cracking-the-whip," a number of skaters hold hands and form a straight line. They try to skate so that the line rotates about the skater at one end, who acts as the pivot. The skater farthest out has a mass of 70.0 kg and is 6.35 m from the pivot. He is skating at a speed of 7.50 m/s. find out the magnitude of the centripetal force that acts on him.
Q2. A uniform steel beam has a mass of 1640 kg. On it is resting half of an identical beam. What is the vertical support force at each end?
The distance between two telephone poles is d = 52.0 m. How much tension does the bird produce in the wire
a circular wire coil with resistance 1.4 and an area 5.0x10^-3m^2 lies perpendicular to a magnetic field that's increasing at 2.0T/s, how many turns are in the coil?
An electric motor rotating a workshop grinding wheel at a rate of 8.90 101 rev/min is switched off. How long does it take for the grinding wheel to stop
A free floating piston cylinder device that contains 1 kg of a 25% quality saturated mixture of water at 150C, Determine the initial and final pressure, the total energy of electrical work added to the water
In each of the following cases, the mass is 7.83 kg and the radius is 7.50 cm. What is the moment of inertia (kg m^2) of a solid cylinder rotating about an axis parallel to the symmetry axis but passing through the edge of the cylin..
What is the longest wavelength of light that may be absorbed by a hydrogen atom that starts in the second excited state
A child and sled with a combined mass of 42.0 kg slide down a frictionless slope. what is the height of the hill
A 1.90-kg object attached to a spring moves without friction (b = 0) and is driven by an external force given by the expression F = 3.20sin(2?t), Find the resonance angular frequency of the system
At this point you are getting very tired and would like to get back as quickly as possible, but all of the available trails seem to lead you deeper into the woods. You would like to take a shortcut directly through the woods (ignoring the trails)...
Astronauts use a centrifuge to simulate the acceleration of a rocket launch. The centrifuge takes 40.0s to speed up from rest to its top speed of 1 rotation every 1.50s, What is the astronaut's tangential acceleration during the first 40.0s
question1a spherical mirror is polished on both sides. when concave side is used as a mirror the magnification is 2.0.
Design a circuit to control the temperature of a water bath at a set-point temperature of 85°C. Choose a resistive sensor and draw up a circuit that will provide control around the set-point.
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