### What is the frictional force, acting on the car

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Q1. A race car starts from rest on a circular track of radius 450m. The car's speed increases at the constant rate of 0.90 m/s2. At the point where the magnitudes of the centripetal and tangential accelerations are equal, find out the speed of the race car.

Q2. A car of mass 960 travels at a speed of 30 along the straight road. The driver sees a red traffic light ahead, and applies brakes. The coefficient of friction between the car tyres and the road is 0.88. Take the acceleration due to gravity to be 9.80.

What is the frictional force, acting on the car?

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