Classical Mechanics Answers

A 210 kg mass initially at rest on a smooth horizontal plane is acted upon by a force F parallel with the plane. If F is 1.4 tN where t is time in seconds, find for an interval of 30 seconds from rest: (a) the impulse (b) the velocity (c) the average force producing the same impulse.

A shunting locomotive provides impulse of 40kN to set motion a stationary 8 tones wagon which then moves off freely at velocity u against a track resistance of 60N/tone and finally reaches a velocity v after 20 seconds. Find the values of u and v.

a spring is stretched by 5 cm when a mass of 70 gm is hung on it. If total mass of 100 gm is hung on spring and the mass starts vertical oscillation. what is the spring constant k ?

A 40 tonnes rail car travels at 4km/h collides with a 100 tonnes wagon moving on the same track in the opposite direction at 1.2 km/h. Find their velocities immediately after impact assuming no loss of energy.

a 2 tonne car is towed by a 2.5 tonne truck which moves off from rest and reaches a speed of 2m/s before the rope tightens on the stationary car. the rope then stretches taking up the strain for 0.15 seconds. find the common speed when the rope ceases to stretch

Is x-ray diffraction observed from the (111) and (211) planes in an fcc structure?

How does the Fermi energy of n- and p- type semiconductors change with dopant
concentration

Explain how a linear monoatomic chain behaves as a low pass filter

Explain with the help of a diagram the difference between a ferromagnet, an anti￾ferromagnet and a ferrite.