A person stands on a spring balance at the equator. (a) How much is the reduction in weight as measured by the balance. (b) If the speed of earth's rotation is changed such that the balance reading is half of its true weight, what will be the length of the day in this case? `(g=10m//s^(2),R_(e)=6400km)`
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WORK, ENERGY AND POWER
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A person stands on a spring balance at the equator. a.By wht fraction is the balance reading less than his true weight? b.If the speed of earth's rotation is increased by such an amount that the balance reading is half the true weight, what will be the lenght o the day in this case?
The systems shown in are in equilibrium if the spring balance is calibrated in newtons, what does it record in each case? (g=10m//s^(2))
A body suspended on a spring balance in a ship weighs W_(0) when the ship is at rest. When the ship begins to move along the equator with a speed v , show that the scale reading is very close to W_(0) (1+-2omegaV//g ), where omega is the angular speed of the earth.
A body weights 98 N on a spring balance at the north pole. What will be its weight recorded on the same scale if it is shifted to te equator? Use g= GM/R^2=9.8m/s^2 and the radius of the earth R=6400 km.
A spring balance fastened to the roof of a lift accelerating upwards indicates 120 N as the weight of a 80 N body. The acceleration of the lift is (g = 10 m//s^(2)) .
How many times faster than its present speed the earth should rotate so that the apparent weight of an object at equator becomes zero ? Given radius of the earth = 6.37 xx 10^(6) m . What would be the duration of the day in that case ?
If the earth has no rotational motion, the weight of a person on the equation is W. Detrmine the speed with which the earth would have to rotate about its axis so that the person at the equator will weight (3)/(4) W. Radius of the earth is 6400 km and g = 10 m//s^(2) .
A body hangs from a spring balance supported from the roof of an elevator. (a) If the elevator has an upward acceleration of 2.45 ms^(-2) and the balance reads 50N, what is the true weight of the body? (b) Under what circumstances will the balance read 30N? (c) What will be the balance reading if the elevator, cable breaks?
Figure shows a light spring balance connected to two blocks of mass 20 kg each. The graduations in the balance measure the tension in the spring. A. What is the reading of the balance? b.Will the reading change if the balance is heavy, say 2.0 kg? c. What will hapen if the spring is light but the blocks the unequal masses?
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