A hotel elevator ascends 160m with a maximum speed of 4.20, Ask an Expert

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Q. The attractive electrostatic force between the point charges +8.58 x10-6 C and Q has a magnitude of 0.960 N when the separation between the charges is 1.42 m. Find out the sign and magnitude of the charge Q.

Q. A hotel elevator ascends 160m with a maximum speed of 4.20 m/s. Its acceleration and deceleration both have a magnitude of 1.0 m/s2. How long does it take to make the complete trip from bottom to top?

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