A lamp hangs vertically from a cord in a descending elevator that decelerates at 2.7 m/s2. (a) If the tension in the cord is 52 N, what is the lamp's mass? (b) What is the cord's tension when the elevator ascends with an upward acceleration of 2.7 m/s2?

Awind turbine is rotating counterclockwise at 0.5 rev/s and slows to a stop in 10 s. its blades are 20 m in length. (a) what is the angular acceleration of the turbine? (b) what is the centripetal acceleration of the tip of the blades at t=0s? (c) what is the magnitude and direction of the total linear acceleration of the tip of the blades at t=0s?

What distance does a car travel as its speed changes from 0 to 20 m/s in 17 s at constant acceleration?

Aprotein molecule in an electrophoresis gel has a negative charge. the exact charge depends on the ph of the solution, but 30 excess electrons is typical. what is the magnitude of the electric force on a protein with this charge in a 1600n/c electric field? write in two significant numbers, and also in newton