GEOG 1000 Lecture 5: dynamicsextrastudyquestions
3 Apr 2018
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To keep his balance, he often has to lean. Which way does he lean, forward or backward, and why: a squirrel with an armful of nuts is sliding helplessly across the flat, icy roof, getting dangerously close to the edge. He understands newton"s third law, and is able to save himself. Explain how he does it: a rocket carrying the space shuttle blasts off from the kennedy space center. In which of the following positions will it have a greater acceleration, assuming that the engines exert a constant force? (a) at ground level (b) 50 m above ground level. Explain your answer: two crates, of mass 12. 0 kg and 20. 0 kg, respectively, are pushed across a smooth floor together, the 20 kg crate in front of the 12 kg crate. Calculate each of the following. (a) the force applied to push the crates (b) the action-reaction forces between the two crates.
