Mechanics | Relativity Answers

A 120N force applied horizontally drags a 4kg load along a horizontal table at uniform velocity of 3m/s find the coefficient of kinetic friction between the load and the table

a man is running eastwards with 6km/h feels the wind blowing from the north, on doubling his speed he feels the wind blowing from the northeast. determine the actual direction and velocity if the wind.

What is the resulting density when you mix 5.0 L of ethyl alcohol and 12.0 L of water?

For an extremely relativistic particle of rest energy e=mc² ,show that the momentum (P) is given by;
P=E[1-½(E/E)²] 

A wagon with a mass of 50t moves at a speed =36km/h. By how much does the internal energy of the brakes of the wagon increase at its complete braking, if 60% of the kinetic energy is converted into internal.

Gas expands at constant pressure p=6,2.10⁵ Pa from volume V₁=3,2.10⁻³ m³ to volume V₂=5,2,10⁻³m³. How much work has been done by the gas?

Compare and contrast the trajectories of a diver leaving the 10m platform with A running take-off with a horizontal velocity of 3.0 ms-1

Sketch graphs of displacement against time and velocity against time for the dive, pointing out the important features of the graphs and the relationship between the two graphs