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Q1. A car of mass 1110 kg travels at a speed of 20 ms-1 along a 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 0.83. Take the acceleration due to gravity to be 9.8ms-2

Q2. A bullet of mass 6.00 is fired horizontally into a wooden block of mass 1.20 resting on a horizontal surface. The coefficient of kinetic friction between block and surface is 0.180. The bullet remains embedded in the block, which is observed to slide a distance 0.220 along the surface before stopping.

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