An electron with the initial speed of 4.00times105 is, Ask an Expert

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Q1. An electron with the initial speed of 4.00×10^5 is brought to rest by an electric field. What was the initial kinetic energy of electron, in electron volts?

Q2. A 22.4 kg beam is attached to a wall with a hinge and its far end is supported by a cable. The angle between the beam and the cable is 90o. If the beam is inclined at an angle of q = 34.9o with respect to horizontal, what is the horizontal component of force exerted by the hinge on beam?

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