Physics
General
Easy
Question
A bob is hanging over a pulley inside a car through a string. The second end of the string is in the hand of a person standing in the car. The car is moving with constant acceleration 'a' directed horizontally as shown in figure. Other end of the string is pulled with constant acceleration ' a ' vertically downward. The tension in the string is equal to :



 m (g + a)
The correct answer is:
(Force diagram in the frame of the car) Applying Newton’s law perpendicular to string mg sinq = ma cos q
Applying Newton’s law along string
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