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`        The relationship between the displacement S of a body andtime t is given by the equation: S = A − Bt + Ct2. S is expressedin meter and t in seconds. Numerical values of the constants areA = 6,B = 3 and C = 1 with appropriate SI units. Mass of thebody is 4 kg. If the motion begins at t = 0, calculate the powerdelivered to the body at t = 4 seconds. Express your answer inwatt.`
2 years ago

MAINAK KHAN
42 Points
```							POWER= FORCE* VELOCITYPOWER= MASS*Acceleration*VELOCITYS=displacementv=velocitya= accelerationds/dt=velocityd(A-Bt+Ct2)/dt= -B+2Ctv=-B+2Ctv=-3+2(1)4                                         (since power at t=4sec)v=5m/sdv/dt=accelerationd(-B+2Ct)/dt=+2Ca=2Ca=2(1)=2m/s2POWER=4(2)5=40watt
```
2 years ago
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### Course Features

• 110 Video Lectures
• Revision Notes
• Test paper with Video Solution
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions