A train traveling along a straight line starts from rest at point A and acceleratesee uniformly to 30ms-1 in 20 sec. It travels at the speed for 60 sec, then slows down uniformly to rest on 40s at point C. It stays at rest at C for 30 sec, then reverses direction, accelerating uniformly to 10ms-1 in 10sec. It travels at this speed for 30 sec, then slows down uniformly to rest in 10sec when it reaches point B 1. Plot a graph

2. Use the graph to calculate a. The trains displacement from point A while it reaches point c

B. The trains displacement from point a when it reaches point B

C. The trains acceleration each time it's speed changes

Please hurry up and get it right it's an emergency

An object moves from the position +34m to the position -15m in 15 seconds. what is it's total displacement? what is it's average velocity?

Consider the particle-in-a-box problem in 1d. a particle with mass m is confined to move freely between two hard walls situated at x = 0 and x = l. the potential energy function is given as (a) describe the boundary conditions that must be satisfied by the wavefunctions ψ(x) (such as energy eigenfunctions). (b) solve the schr¨odinger’s equation and by using the boundary conditions of part (a) find all energy eigenfunctions, ψn(x), and the corresponding energies, en. (c) what are the allowed values of the quantum number n above? how did you decide on that? (d) what is the de broglie wavelength for the ground state? (e) sketch a plot of the lowest 3 levels’ wavefunctions (ψn(x) vs x). don’t forget to mark the positions of the walls on the graphs. (f) in a transition between the energy levels above, which transition produces the longest wavelength λ for the emitted photon? what is the corresponding wavele

Apulley system is used to lift a 2,000 newton engine up a distance of 3 meters. the operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor. to lift the engine 3 meters, the operator must pull a total of 30 meters of chain through the pulley system. what is the value of di?