An elevator ascends with an upward acceleration of a. at the instant its upward speed is v, a loose bolt drops from the ceiling of the elevator distance d from the floor. calculate: a. the time of flight of the bolt from ceiling to floor. b. the distance it has fallen relative to the elevator shaft.

Astring that is fixed at both ends has a length of 1.05 m. when the string vibrates at a frequency of 91.0 hz, a standing wave with five loops is formed. (a) what is the wavelength of the waves that travel on the string? (b) what is the speed of the waves? (c) what is the fundamental frequency of the string?

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What kind of simple machine is a catapult?