Question

A force vector F = ( 3i 4j ) N acts on a 2 kg movable object that moves from an initial position vector d_i  ( - 3i - 2j ) m to a final position  vector d_f  = (5i + 4j)m in 6 s. The average power delivered by the force during the interval is equal to :

(A) 8 watt

(B) 50/6 Watt

(C) 15 watt

(D) 50/3 watt.

Answer 1

Correct option: (A) 8 watt

Explanation:

Wavelength and velocity are medium dependent. Final amplitude is decided by the superposition of individual amplitudes.