1 answer

Mastering physics 74

Question:

The engine in an imaginary sports car canprovide constant power to the wheels over a range of speeds from 0to 70 miles per hour (mph). At full power, the car canacceleratefrom zero to 32.0 mph in time 1.00 s.At full power, how long would it take for thecar to accelerate from 0 to 64.0 mph? Neglect friction and air resistance.Express your answer in seconds.he engine in an imaginary sports car can provide constant power tothe wheels over a range of speeds from 0 to 70 miles per hour(mph). At full power, the car canaccelerate from zero to32.0 mph in time 1.00 s.

Answers

Enginegiven the velocity V to the car in atime tpower deliverd = Energy deliverd /time=(mv^2 / 2 ) / timem = mass of thecarv = velocityof the cart = time ofaccelerationfrom the above relation we can solve for power Pnow time to accelerate to a velocityv't = E / PE = mv'^2 /2P = engine powert = time taken to reach velocityv'using the given values we can solve above relations..

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