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When brakes are applied on a moving vehicle, work done by brak

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When brakes are applied on a moving vehicle, work done by braking force is negative, because braking force and displacement are in the opposite direction $θ = 18 0^{\circ}$ . $W = - F \times s = - F s$ Zero Work Work done will be zero if (a) Force acting is zero or (b) Displacement is zero or (c) Angle between applied force on an object and its displacement is $9 0^{\circ}$ . Illustration 6 : When a coolie (porter) carrying some load on his head moves on horizontal platform, in order to balance the load on his head, he applies a force on the load in the upward direction which is equal to its weight. His displacement is along the horizontal direction. The angle between weight on the coolie and the displacement is $9 0^{\circ}$ . Therefore work done by him is zero.

Uploaded: 2022-11-04T07:43:43.000Z
Duration: 12 min

Views: 5,695 students

Updated on: Nov 4, 2022

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When brakes are applied on a moving vehicle, work done by braking force is negative, because braking force and displacement are in the opposite direction

θ = 18 0^{\circ}

W = - F \times s = - F s

Zero Work Work done will be zero if (a) Force acting is zero or (b) Displacement is zero or (c) Angle between applied force on an object and its displacement is

9 0^{\circ}

. Illustration 6 : When a coolie (porter) carrying some load on his head moves on horizontal platform, in order to balance the load on his head, he applies a force on the load in the upward direction which is equal to its weight. His displacement is along the horizontal direction. The angle between weight on the coolie and the displacement is

9 0^{\circ}

. Therefore work done by him is zero.

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Question Text	When brakes are applied on a moving vehicle, work done by braking force is negative, because braking force and displacement are in the opposite direction $θ = 18 0^{\circ}$ . $W = - F \times s = - F s$ Zero Work Work done will be zero if (a) Force acting is zero or (b) Displacement is zero or (c) Angle between applied force on an object and its displacement is $9 0^{\circ}$ . Illustration 6 : When a coolie (porter) carrying some load on his head moves on horizontal platform, in order to balance the load on his head, he applies a force on the load in the upward direction which is equal to its weight. His displacement is along the horizontal direction. The angle between weight on the coolie and the displacement is $9 0^{\circ}$ . Therefore work done by him is zero.
Updated On	Nov 4, 2022
Topic	Physics
Subject	Science
Class	Class 9
Answer Type	Video solution: 1
Upvotes	74
Avg. Video Duration	12 min

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