Mechanics | Relativity Answers

Two waves, travelling along the same direction, are given by
y1(x, t) = asin (w1t − k1x)
and y2 (x, t) = asin (w2t − k2x)
Suppose that the values of w1 and k1 are respectively slightly greater than w2 and
k2 . i) Obtain an expression for the resultant wave due to their superposition. ii)
Explain the formation of wave packet

A book of mass 3 kg rests on a plank. You tilt one end of the plank and slowly increase the angle of the tilt. The coefficient of static friction between the book and the plank is 0.52. What is the maximum angle of tilt for which the book will remain stationary and not slide down the plank?

the average life span of a neutron as a free particle at rest is 15 meter . it disintegrate spontaneously into an electron, proton and neutron. what is the average minimum velocity with which a neutron must leave the sun in other to reach the earth before breaking up. take the distance of earth from sun as 11*10^10?

Where would unbalanced forces be seen at a circus

A body of mass 10kg initially at rest is subjected to a force of 20N for 1second. Calculate the change in kinetic energy during that time.

A boy whose mass is 40kg runs up a flight of 30 steps, each 150mm high, in 6 seconds. Find the average power developed. (Take g as 10m/s2).

Calculate the volume of a parallelepiped whose sides are given by the vectors
a = 3ˆi + 2ˆj + kˆ, b = −ˆi + 3ˆj and c = 2ˆi + 2ˆj + 5kˆ

A horizontal rod with a mass of 10kg and length 12m hinged to a wall at one end and supported by a cable which make an angle of 30deg with the rod at its other end. Calculate the tension in the cable and force exerted by hinge .Draw the diagram.

Think! Using the conversion rate of 4.19 joules per calorie, how much energy is necessary to heat 2.50 liters of water in a steam engine from 100°C to steam at 250°C?

a child of mass 50kg is standing an the edge of merry gi round of mass 250kg and radius 3m which is rotating with an angular velocity of 30rad/sec . what will be the final angular velocity of the merry go round when child reached the center ?