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Q. A 19kg child sits in a swing supported by two chains each 3m long. If tension in each chain at the lowest point is 140N find the childs speed at the lowest point.
Q. An elevator has mass 610 kg, not including passengers. The elevator is designed to ascend, at constant speed, a vertical distance of 20.0 m (five floors) in 17.0 s and it is driven by a motor that can provide up to 40 hp to the elevator.
Two small metallic spheres, each of mass 0.20g, are suspended as pendulums by light strings from a common point.
A solid cylinder with mass and radius, rotating with angular speed about an axis throughout its center, is set on the horizontal surface for which the kinetic friction coefficient is.
A helicopter is ascending vertically with a speed of 9 m/s. At a height of 200 m above the Earth, a package is dropped from a window. How much time does it take for the package to reach ground.
A 3.06 kg block slides down a frictionless plane inclined 18.6' to the horizontal. If length of the plane's surface is 1.43 m, how much work is done, and by what force.
Find out the minimum sound intensity
Attempting to stop on a slippery road, a car moving at 80 skids across road at a 30 angle to its initial motion, coming to a stop in 3.8.
A small steel ball bearing with a mass of 11g is on a short compressed spring. When aimed vertically and suddenly released, spring sends the bearing to a height of 1.21 m. compute the horizontal distance the ball would travel if the same spring we..
A sealed tank containing seawater to the height of 11.10 m also contains air above the water at a gauge pressure of 3.20 atm. Water flows out from the bottom throughout a small hole.
What is magnetic flux through the desk surface
A 56.0 resistor is connected in parallel with a 117.0 resistor. This parallel group is connected in series with the 27.0 resistor. The total combination is connected across a 15.0 V battery. What is the current of the 117 resistor? What is the power ..
Create a graph corresponding to the stone vertical velocity
You have a 56.9-mF capacitor initially charged to a potential difference of 10.1 V. You discharge the capacitor through a 4.77-Ω resistor. What is the time constant? After what multiple of the time constant does the potential difference reach 2.47 V.
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