Classical Mechanics Answers

The resultant vectors A a d B has a magnitude of 20 units. A has a magnitude of 8 units and the angle between A and B is 40 degrees. Calculate the magnitude of B

 The resultant R= 1,350 N of the three concurrent forces in the figure points vertically down along Y- axis. Find the magnitude and direction of the unknown for

One-half of Heather's age two years from now plus one-third of her age three years ago is twenty years. How old is she now?

A material of Length L1 at a temperature teta1, K is subjected to a temperature rise of Θ K. The coefficient of linear expansion of the material is alpha per kelvin. The material expands by?

The amount by which unit length of a material increases when the temperature is raised by one degree is called the coefficient of?

A. cubic expansion B. Superficial expansion C. Linear expansion

A car of mass 50tonnes pulls another car of mass 10tonnes, starting from rest the 2 masses attain a velocity of 20m/s in 5s. The coefficient of friction on each car equals 5N/tonne. Calculate

a) Force exerted by the engine

b) time required to cover 100m

The earth revolves round the sun with constant speed on an orbit of radius r=1.5x10^11m. Find the earth's acceleration towards the sun.

A mass of 0.4kg is rotated by a string at constant speed v in a vertical circle. R=1m. If the minimum tension is 3N. Calculate

a) v

b) maximum tension when string is horizontal

.... Project

Write Applications of bernoull's principle.

With how they work

Write the difference and similarity between classical and modern aerodynamics theory.