Questions

In SI units, the dimensions of √ε₀/μ₀ is

Ship A is sailing towards north-east with velocity $\overrightarrow{v} = \left( 30\widehat{i} + 50\widehat{j} \right)\ kmh^{- 1}$ where î points east and ĵ, north. Ship B is at a distance of 80 km east and 150 km north of ship A and is sailing towards west at 10 km h^-1. A will be at minimum distance from B in

Four particles A, B, C and D with masses m_A = m, m_B = 2m, m_C = 3m and m_D = 4m are at the corners of a square. They have accelerations of equal magnitude with directions as shown. The acceleration of the centre of mass of the particles is

A particle moves in one dimension from rest under the influence of a force that varies with the distance travelled by the particle as shown in the figure. The kinetic energy of the particle after it has travelled 3 m is

Four identical particles of mass M are located at the corners of a square of side a. What should be their speed if each of them revolves under the influence of others gravitational field in a circular orbit circumscribing the square?