An elevator filled with passengers has a mass of 1.70×103kg . (a) the elevator accelerates upward from rest at a rate of 1.20m/s2 for 1.50 s. calculate the tension in the cable supporting the elevator. (b) the elevator continues upward at constant velocity for 8.50 s. what is the tension in the cable during this time? (c) the elevator decelerates at a rate of 0.600m/s2 for 3.00 s. what is the tension in the cable during deceleration? (d) how high has the elevator moved above its original starting point, and what is its final velocity?

Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.

Which of the following is the best name for mgcl2

In an old-fashioned amusement park ride, passengers stand inside a 3.0-m-tall, 5.0-m-diameter hollow steel cylinder with their backs against the wall. the cylinder begins to rotate about a vertical axis. then the floor on which the passengers are standing suddenly drops away! if all goes well, the passengers will “stick” to the wall and not slide. clothing has a static coefficient of friction against steel in the range 0.60 to 1.0 and a kinetic coefficient in the range 0.40 to 0.70. part a what is the minimum rotational frequency, in rpm, for which the ride is safe? express your answer using two significant figures. f f = rpm