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Q1. Use the simulation in the cannon interactive in this section to answer the following questions. (a) Does cannonball's horizontal velocity change as it moves through the air? (b) Does its vertical velocity change? (c) If you enhance the cannonball's horizontal velocity, does it stay in the air longer, the same amount of time, or shorter? (d) Who is inside the left haystack?

Q2. A 60.0 kg boy and a 40.0 kg girl decide to play "tug of war" on a frictionless surface. In the process, the girl accelerated toward the boy at 3.0 m/sec2. What is the acceleration of the boy toward the girl?

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