A heavy ball with mass 10 kg is hung from the ceiling of Stolkin Auditorium on a rope of length 4.5 m. It is pulled to one side and released, swinging like a pendulum; at its lowest point, it reaches a speed of 6 m/s. What is the tension in the rope at that point?

Explanation:

The given data is as follows.

        mass = 10 kg,     length = 4.5 m

       speed (v) = 6 m/s

Now, formula to calculate tension is as follows.

           T =

Putting the given values into the above formula as follows.

                T =   (here r = l)  

                   =

                   = (98 + 80) N

                   = 178 N

Thus, we can conclude that tension in the rope at that point is 178 N.

explanation: in any substance/object, the particles inside it (atoms/molecules) constantly move in random directions and with random speeds (this motion is called brownian motion). as a result, the particles have some kinetic energy (which is proportional to the temperature of the substance).

explanation:

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a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.