Mechanics | Relativity Answers

Identify the unit in which power is measured

55 kg student stands on a bathroom in 3000 N elevator cabin that is supported by a cable as the cabin starts moving the scale read the mass of student as 45 kg. What is the acceleration vektor of cabin? What is tension in cable ?

a particle of mass m moves io a circle of radius r. Its velocity v=k(s)^1/2. Calculate force on the particle

what is the distance between two consecutive nodes of a traveling wave of wavelenght?

A penguin is held under the surface of seawater by a tension of .18 pounds. His density is 1.8 slugs per cubic foot. What is his volume?

A student wearing frictionless in-line skates in a horizontal surface is pushed by a friend with a constant force of 45N. How far must the student be pushed, starting from rest her final kinetic energy is 352J?

a light ladder is supported on a rough floor and leans against a rough wall.how far up the ladder can a man climb without slipping taking place?

an archer fires an arrow with an initial velocity of 4m/sec
atan elevation of 45 degrees.
calculate:
a) the max height attained
b) the time of flight
c) the max range of the arrow

a girl pushes her little brother on his sled with a force of 300N for 750m . How much work is this if the force of friction on acting on sled is 200N

what will happen to the speed of aircraft if the mass of the same reduces during the flight but the enginie force remains the same ??