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Q1. The front 1.20 m of a 1600 kg car is designed as a "crumple zone" that collapses to absorb the shock of a collision.
If a car travelling 25.0 m/s stops uniformly in 1.20 m, how long does the collision last?
Q2. A ceiling fan with 82-cm-diameter blades is turning at 68 rpm. Suppose the fan coasts to a stop 30s after being turned off.
a.) What is the speed of the trip of a blade 10 s after the fan is turned off?
b.) Through how many revolutions does the fan turn as stopping?
You work for a moving company and are given the job of moving two crates (masses are 130kg and 280kg) held together by a rope attached between the two. You pull on a rope attached to the larger crate giving the system the acceleration of 0.29m/s2. Wh..
Find the position of the object to acquire real, magnified image, inverted, and virtual, upright image.
The effects of the spin of the earth
Water at a gauge pressure of 3.0 atm at street level flows into an office building at the speed of 0.40 m/s by a pipe 5.0 cm in diameter. The pipe tapers down to 2.20 cm in diameter by the top floor, 15 m above, where the faucet has been left open. E..
Two wires are identical, except that one is aluminium and one is gold. The aluminium wire has a resistance of 0.18. What is resistance of the gold wire.
Heather and Jerry are standing on a bridge 46 above a river. Heather throws the rock straight down with a speed of 20. Jerry, at accurately the same instant of time, throws a rock straight up with the same speed. Overlook air resistance.
A resistor is in the shape of a cube, with each side of resistance R . Find the equivalent resistance between any two of its adjacent corners.
What is an index of refraction of the liquid
A current of 2.5 a runs through 20 circular wire loops of diameter 10 cm. What is the magnetic field magnitude and direction at the center of the loops? (Show the derivation of any formula that you use.)
A 220 g block is attached to a horizontal spring and executes simple harmonic motion with a period of 0.150 s. If the total energy of the system is 3.50 J.
The latent heat of fusion
A ship sets out to sail to a point 156 km due north. An unexpected storm blows the ship to a point 118 km due east of its starting point. How far should it now sail to reach its original destination.
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