Mechanics | Relativity Answers

The linear density of a vibrating string is 1.3 × 10−4 kg m−1. A transverse wave is
propagating on the string and is described by the equation
y (x, t) = 0.021 sin (x − 30t)
where x and y are in metres and t is in seconds. Calculate the tension in the string.

A sinusoidal wave is described by
y (x, t) = 2.0 sin (2.11x − 3.62t) cm
where x is the position along the wave propagation. Determine the amplitude, wave
number, wavelength, frequency and velocity of the wave.

A simple harmonic oscillator has an amplitude of 0.17 m and a period of 0.84 s.
Determine the frequency, and the angular frequency of the motion. Write expressions for
the time dependence of displacement, velocity and acceleration. What are the maximum
values of the velocity and acceleration?

A 206-kg crate is pushed horizontally with a force of 705 N. If the coefficient of friction is 0.20, calculate the acceleration of the crate.

Calculate the force of gravity on a 20 kg mass at Earth's surface. The mass of Earth is 6. 1024 kg, and its radius is 6.4 106 m.?

a 6 kg cart on a level surface is pulled at a constant velocity of 2.0 m/s by a constant force of 10 N. What is the acceleration and what is the magnitude and diraction of the friction force?

a car accelarates from 0/ms to 30/ms in 5 second has an accelaration of...........m/s2?

If a man pushes on a crate with 10 newtons of force and Fred the goat pushes with him with another 10 newtons of force, what is the net force of Fred and the man on the crate?

a body has a mas 80 kilogram and height 250 km. find its weight using universal law of gravitation in newton and in pounds??

The speed of light in a vacuum is given as 299792458 ms-1 (9 significant figures).what is the value for the speed of light at 2 sig figures?