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A ladder of weight 200 N and length 10 meters leans against a smooth, friction less wall. A fire fighter of weight 600 N climbs a distance up the ladder. The coefficient of static friction between the floor and the ladder is 0.5. The angle between the floor and the ladder is 50 degrees. Find the maximum distance the fire fighter can climb up the ladder if the ladder is not to slip?
Three charged particles are placed at each of three corners of an equilateral triangle whose sides are of length 2.8 . Two of the particles have a negative charge: = -6.7 and = -13.4 . The remaining particle has a positive charge, = 8.0 . What is ..
a harmonic wave is traveling along a rope. it is observed that the oscillator that generates the wave completes 43.0
A converging lens with a focal length of 20 cm and a diverging lens with a focal length of -70 cm are 110 cm apart. Calculate the distance between image and diverging lens
A body is released from rest a long way from the centre of theearth. With what velocity will it hit the earth. Describe htevelocity
two speakers that are in phase with each other are separated by a distance of 4.3 m and met a sound of frequency 221hz.
q1. a football spends a total of 5 seconds in the air. it reaches a peak height of 30 meters. how long does it take to
the expression f arv br2v2 gives the magnitude of the resistive force in newtons exerted on a sphere of radius r in
A 1050kg car carrying four 78kg people travels over a rough "washboard" dirt road with corrugations 4m apart which causes car to bounce on its spring suspension.
A series RLC circuit is driven by a voltage of amplitude 5V. If w(omega)= 1000s^-1, L = 5H, C=3muF and R =2komega. Find the amplitude of the current. Find the amplitude of the voltages across the capacitor, inductor, and resistor Find the phase diffe..
An RL circuit has a 5 kO resistor and a 1 mH inductor. This circuit is driven by a 100 Hz sine wave with 1 V amplitude. What is the amplitude of the current in the circuit
During an adiabatic process, the temperature of 3.92 moles of a monatomic ideal gas drops from 485 oC to 205 oC. For this gas. find the net change in internal energy of the system
in molecules of gaseous sodium chloride the chloride ion has one more electron than proton and the sodium ion has one
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