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Chapter 1: Q28E (page 359)
A nylon rope used by mountaineers elongates 1.10 m under the weight of a 65.0-kg climber. If the rope is 45.0 m in length and 7.0 mm in diameter, what is Young鈥檚 modulus for nylon?
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A bird is flying due east. Its distance from a tall building is given by
.What is the instantaneous velocity of the bird when t = 8.00 s?
You hold a hose at waist height and spray water horizontally with it. The hose nozzle has a diameter of 1.80 cm, and the water splashes on the ground a distance of 0.950 cm horizontally from the nozzle. If you constrict the nozzle to a diameter of 0.750 cm, how far from the nozzle, horizontally, will the water travel before it hits the ground? (Ignore air resistance.)
Given two vectorsand, (a) find the magnitude of each vector; (b) use unit vectors to write an expression for the vector difference; and (c) find the magnitude of the vector difference. Is this the same as the magnitude of? Explain.
A hammer with mass m is dropped from rest from a height h above the earth鈥檚 surface. This height is not necessarily small compared with the radiusof the earth. Ignoring air resistance, derive an expression for the speed v of the hammer when it reaches the earth鈥檚 surface. Your expression should involve h,, and(the earth鈥檚 mass).
A car travels in the +x-direction on a straight and level road. For the first 4.00 s of its motion, the average velocity of the car is . How far does the car travel in 4.00 s?
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