# physics 11 force/fiction question?

a racing car that has a mass of 1500 kg is accelerating at 5.0 m/s square. The car experiences a lift force of 600 N up and 1000 N down. find the driving force needed to keep the car driving if (MU) for the car is 1.0.

thanks

the answer is 2.26 x 10 to the power of 4 N

• Pearlsawme
1 month ago

Net downward force = mg +1000 -600 =

1500*9.8 + 1000 -600 = 15100

Normal reacton is 15100 N

Frictional force = μ* 15100 = 15100 N

Force pulling the car with acceleration is

ma =1500* 5 = 7500 N

The net force needed is 7500 +15100= 22600 N

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• Anonymous
4 days ago

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