Mechanics | Relativity Answers

If an error in the measurement of radius of a sphere is 2% then the error in the determination of volume of sphere will be

An object placed on a scale is riding in an elevator. What is the measurement of mass taken by an observer in the elevator if the mass of the object at rest is 45.6 kg? Assume that the acceleration of the elevator is directed upward and is equal to 2.72 m/s2.

The ratio of pressure force L to friction force D for an object A in contact with object B is L/D = 10. what is the coefficient of friction of A/B?

how to find resultant force when 3 forces act on a body

the speed of a train is reduced from 16.6667 m/sec at the same time as it travels a distance of 450 m if the retardation is uniform, find how much further it will travel before coming to rest?

A body falls freely from top for a tower . It covers 36% of total height in last second before stricking the ground level. A height of tower is?

A 125 kg box is sling down a 27 degree ramp at a constant velocity of 1.12 m/s. What is the friction force acting on it?

What is the force of friction holding a 225 kg box on a ramp that forma a 25 degree angle with the ground?

What is the μ of between a 520 kg wooden crate and the concrete ramp (15º) that it is sitting on?

Object being pulled with friction
An object of mass m is being pulled along a smooth surface generating a friction force resultant against the motion of the object. As the velocity of the object increases from an increasing in pulling, what is the effect on the friction force?