Most people lose about 74 hairs per day out of a typical headful of 128 000. Suppose each hair averages 22 cm long. If you placed a year's lost hairs end-to-end, how far would they extend?

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1 m

Use Fig. 2.5 to calculate the distance traveled by the bee (whose speed-time graph is plotted) in the time interval from 1.28 s to 2.24 s.

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1 m

Figure 2-5

Two trains heading straight for each other on the same track are 250 m apart when their engineers see each other and hit the brakes. The Express, heading west at 99 km/h, slows down, accelerating at an average of -4 m/s² while the eastbound Flyer, traveling at 134 km/h, slows down, accelerating at an average of -3 m/s². Will they collide?
If they do not collide, give the distance by which they are separated when they stop. If they do collide, give the distance they would have to have started from if they were to avoid colliding (barely).

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2 m

Referring to Fig 4.22b, suppose m₂ equals 2.00 kg and it's on a frictionless surface. If m₁ = 8.8 kg, someone holds m₂ at rest, what will be the tension in the string?

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1 N

Figure 4.22b

A spacecraft is in a circular orbit about a planet located at point O in Fig. MC20. When it reaches point A on its orbit, the First Mate throws a canister out the front port straight ahead; the canister goes into a new orbit shown in

Figure MC20