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Question: A body of mass 60 kg is dragged with just enough force to start moving on a rough surface with coefficients of static and kinetic friction 0.5 and 0.4 respectively.On applying the same force what is the acceleration?
a) .98 m/s2
b) 9.8 m/s2
c) .54 m/s2
d) 5.292m/s2
A 0.43 kg particle moves in an xy plane according to x(t) = - 13 + 4 t - 3 t3 and y(t) = 26 + 9 t - 7 t2, with x and y in meters and t in seconds. what is the angle of the particle's direction of travel
A 4 ohm resistor and 10 ohm resistor are connected in series. how much current will flow through the circuit
A wall in a house contains a single window. The window consists of a single pane of glass whose area is 0.19 m2 and whose thickness is 9 mm. what is the percentage lost by the window
A record (mass 100g and radius 12cm) is rotating at a rate of 33rpm. What is the new rotational rate if angular momentum is conserved
A heat engine has a maximum possible efficiency of 0.800. If it operates between a deep lake with a constant temperature of 287.0 k, what is the temperature of the hot reservoir
In a cement mixer, cement, gravel and water are mixed by tumbling in a slowly rotating drum. Calculate the maximum angular speed for which the materials will mix
A 1300kg sports car accelerates from 0m/s to 26m/s in 13s. What is the average power of the engine?
A sealed container of volume 0.10 m3 holds a sample of 3.0 × 1024 atoms of helium gas in equilibrium. Calculate the temperature and pressure of the helium gas
A charge of 3.0 micro coulombs and a second charge are initially far apart. If it takes 29 J of work to bring them to a final configuration in which the 3.0 micro coulombs is at x = 1.0 mm,
A construction crew pulls up an 87.5-kg load using a rope thrown over a pulley and pulled by an electric motor. How much work was done by the motor
The graphite in a pencil has a resistivity of7.84×10−6 W×m.The graphite's diameter is 0.700 mm and its length is40.0 mm. (a) Find the resistance of this graphite "wire."
The Moon is 3476 km in diameter and orbits the Earth at an average distance of 384,400 km. What is the angular size in radians of the Moon as seen from Earth
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