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Q. A 16 kg steel ball is launched from a cannon at an angle of 20 degrees above the horizontal. The cannon exerted an average force of 1200 Newtons on the ball during launch. Now that the ball is in the air and has almost reached its target, what is the magnitude of the net force acting on the ball? (Neglect air resistance.)

Q. On a distant planet, golf is just as popular as it is on earth. A golfer tees off the drives the ball 3.5 times farther than he would have on earth, given the same initial velocities on both planets. The ball is launched at a speed of 45 m/s at an angel of 29 above the horizontal. When the ball lands, it is at the same level as the tee. On the distant planet, what is (a) the maximum height and (b) the range of the ball?

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