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A 35.0-kg child swings in a swing supported by two chains, each 2.92 m long. The tension in each chain at the lowest point is 430 N.
(a) Find the child's speed at the lowest point.
m/s
(b) Find the force exerted by the seat on the child at the lowest point. (Ignore the mass of the seat.)
N (upward)
When your friend is riding a 6.50-kg bicycle, the weight is supported more on the back tire and less on the front tire. what is your friend's weight
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A thin film of alcohol (n=1.36) lies on a flat glass plate (n=1.51). When monochromatic light is incident normally on the system, What is the thickness of the film
A man pushes on a piano with mass 180 {rm kg} so that it slides at constant velocity down a ramp that is inclined at 20.0^circ above horizontal floor. Overlook any friction acting on the piano.
The energy provided each hour by heat to the turbine in an electric power plant is 9.5 x 10^12 J. If 6.5 x 10^12 J of energy is exhausted each hour from the engine as heat
Using Gauss' Law, find the electric field (magnitude and direction) between the cylindrical shell and the rod. The electric field will depend on the distance r from the central axis of the solid rod. Find the amount of charge enclosed by the surfac..
Capacitors C1 = 5.0 µF and C2 = 2.0 µF are charged as a parallel combination across a 250 V battery. Calculate the resulting charge on each capacitor
A roller coaster goes 26 m along a section of track sloping 10 degrees below the horizontal, followed by a 15-m section sloping upward at 6 degrees, followed by an 18-m section of level track. Find the net displacement.
A body in free fall reaches the ground in 5 s. From what height in meters was it dropped
A wooden block weighing 7 N is at rest on top of a wooden desk. The coefficient of static friction between the block and the desk is 0.41. Find out the minimum horizontal force required to move the block if the following occurs.
Aluminum wiring rated at 30. A maximum current is to be installed in a home. how thick diameter does the wire have to be
A charge of -8.0 nC is uniformly distributed around a ring of radius 1.3 m that lies in the yz plane with its center at the origin. Calculate the work done in moving the point charge to the origin
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