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Q. A 4.20kg steel ball strikes a wall with a speed of 7 m/s at an angle of 60° with the surface. It bounces off with the similar speed and angle. If the ball is in contact with the wall for 0.20 s, what is the average force exerted by the wall on ball?

Q. A rifle is aimed horizontally at a target 58.00 away. The bullet hits the target 2.50 below the aim point. What was the bullet's flight time?

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