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A circular-motion addict of mass 85 kg rides a Ferris wheel around in a vertical circle of radius 10 m at a constant speed of 6.0 m/s.
(a) What is the period of the motion?
(b) What is the magnitude of the normal force on the addict from the seat when both go through the highest point of the circular path?
(c) What is it when both go through the lowest point?
A 1.0 mW HeNe laser with wavelenght 633 nm is shown on a metal. The photocurrent is reduced to zero with stopping potential of 0.50 volts, What is the work function of the metal and what is the cutoff wavelength
As morning sunlight falls on a tethered helium balloon, it expands from a volume of 1.05 ×103 m3 to 1.15 ×103 m3. how many joules of solar energy are absorbed
Point A is at position (4j -3k)cm. Point B is at position -3cm k. Point C is at position (3i -2j + 5k) cm. Point D is at position 4cm j. Charges of -4 and +5uC are at A and B respectively. What is the electric potential energy of an electron at D
Two 1000 kg cars drive east; the first moving at 25 m/s, the second at 15 m/s. What is the magnitude of the total momentum of the system
Wool is rubbed against a plastic ruler. how many electrons have been transferred to the ruler
A certain airplane has a speed of 250.0 km/h and is diving at an angle of 30.0° below the horizontal when the pilot releases a radar decoy. How high was the plane when the decoy was released
The 1900-turn coil in a dc motor has an area per turn of 1.1 10-2 m2. The design for the motor specifies that the magnitude of the maximum torque is 5.8 N · m, What is the current in the coil
A uniform plank of length 5.8 m and weight 217N rests horizontally on two supports, with 1.1m of the plank hanging over the right support. To what distance x can a person who weighs 460 N walk on the overhanging part of the plank before it just beg..
Suppose that you are traveling on board a spacecraft that is moving with respect to the earth at a speed of 0.970c. compute your breathing rate
You are pushing a 150-kg wooden crate in a straight line a distance of 4.5 m across a wooden floor. What is the work done by friction on the crate
A 2.30×103 ? resistor and a capacitor are connected in series and then a 12.00 V potential difference is suddenly applied across them. Calculate the time constant of the circuit
A 110 grams sample of water at 30 degrees Celcius is heat to steam at 130 degrees Celcius. how much heat is absorbed
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