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Q. A 13 g bullet traveling 217 m/s penetrates a 2.0 kg block of wood and emerges cleanly at 153 m/s. If the block is stationary on a frictionless surface when hit, how fast does it move after the bullet emerges?

Q. The mass of a sports car is 1300 kg. The shape of the car is such that the aerodynamic drag coefficient is 0.240 and the frontal area is 2.10 m^2. Neglecting all other sources of friction, calculate the initial acceleration of the car ,if it has been traveling at 110 km/h and is now shifted into neutral and is allowed to coast.

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