A car of mass 1100 kg is claimed to be capable of reaching a speed of...

 

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A car of mass 1100 kg is claimed to be capable of reaching a speed of 60 mph from rest in 8.5 seconds. Take 60 mph = 96 kph. 1. Assuming that the rate of acceleration of the car is constant throughout the time it is accelerating: calculate the power the car's engine is developing at the wheels the moment before it reaches 60 mph. 2. State two other assumptions you have made in arriving at your answer. 3. If the car's effective cross-sectional area is 1.6 m², and its drag coefficient is 2.3. use your calculated power rating from part (1) to estimate the maximum speed the car could reach on level ground. Take the density of air to be 1.2 kg m-³. 4. State two other assumptions you have made in arriving at your answer. A car of mass 1100 kg is claimed to be capable of reaching a speed of 60 mph from rest in 8.5 seconds. Take 60 mph = 96 kph. 1. Assuming that the rate of acceleration of the car is constant throughout the time it is accelerating: calculate the power the car's engine is developing at the wheels the moment before it reaches 60 mph. 2. State two other assumptions you have made in arriving at your answer. 3. If the car's effective cross-sectional area is 1.6 m², and its drag coefficient is 2.3. use your calculated power rating from part (1) to estimate the maximum speed the car could reach on level ground. Take the density of air to be 1.2 kg m-³. 4. State two other assumptions you have made in arriving at your answer.

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1 To calculate the power the cars engine is developing at the wheels we can use the equation for pow... View the full answer