The velocity of a body changes from 2 m/s to 10 m/s in 4 s. Distance covered in this time is (assuming constant acceleration) MCQ with Answer and Explanation

Explanation:
Louis de Broglie proposed that matter exhibits wave-like properties. The de Broglie wavelength (lambda) of a particle is given by the formula lambda = h / p, where 'h' is Planck's constant and 'p' is the linear momentum (mass * velocity) of the particle. Therefore, the wavelength is strictly inversely proportional to the momentum of the moving particle.

Explanation:
Galileo first proposed concept of inertia. Newton formalized.

Explanation:
Friction acts parallel to surfaces, opposes motion. Static, kinetic, rolling friction. Depends on normal force and surface roughness. Necessary for walking, vehicles.