A particle moves in the x-y plane under the influence of a force such that its momentum is p(t) = A[i cos(kt) - j sin(kt)]. Where A and k are constants. The angle between the force and momentum is

Question:

A particle moves in the x-y plane under the influence of a force such that its momentum is p(t) = A[i cos(kt) – j sin(kt)]. Where A and k are constants. The angle between the force and momentum is

Options :

(a) 0°
(b)30°
(c)45°
(d)90°

Answer :

(d) 90°

Answer Steps :

step 1:

step 2:

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An alternating voltage source is connected in series with a resistance R and an inductance L. If the potential drop across the resistance is 200 V and across the inductance is 150 V, then the applied voltage is:

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