Laws of MotionHard
Question
A man of mass 50 kg is pulling on a plank of mass 100 kg kept on a smooth floor as shown with force of 100 N. If both man & plank move together, find force of friction acting on man.
Options
A.
N toward left
N toward leftB. N toward right
N toward rightC.
N toward left
N toward leftD. N toward right
N toward rightSolution
For man For plank
T - f = 50a T + f = 100a
⇒ 2T = 150 a ⇒ a =
ms-2
∵ T - f = 50 a ∴ 100 - f = 50 ×
⇒ f =
N toeards left
T - f = 50a T + f = 100a
⇒ 2T = 150 a ⇒ a =
ms-2∵ T - f = 50 a ∴ 100 - f = 50 ×
⇒ f =
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