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A 23 kg block rests on a surface which has a coefficient of friction of 0.4.
What will be the value of the inclined force, P, when the block is just on the point of sliding?
P is at 30 degrees upwards from the horizontal
An asteroid, whose mass is 1.5 x 10-4 times the mass of Earth, find the period of revolution of the asteroidin years
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Phil is standing on a third floor balcony, 10m above the ground. Where does the ball hit the ground
Two events occur in an inertial system K as follows: Event 1: x1 = a t1 = 2a/c y1 = 0 z1 = 0 Event 2: x2 = 2a t2 = 3a/2c y2 = 0 z2 = 0 In what frame K’ will these events appear to be simultaneous? Is there a frame K’ in which the two events described..
A golf ball strikes a hard, smooth floor at an angle of 30 ° and, as the drawing shows, rebounds at the same angle. The mass of the ball is 0.047 kg, its speed is 45 m/s just before and after striking the floor. What is the magnitude of the impuls..
Only about 5 % of the energy in the universe is composed of baryonic matter. Estimate the density of dark matter in the universe
In the notes I stated that a moving charge will have an electric field. This electric field will produce a magnetic field that is out of phase with the electric field. What is the size of the net force that the positive charge will feel
A skier is sliding downhill at 5 m/s when she reaches an patch on which her skies move freely with neglegible friction. What is the speed of the skier at the bottom of the icy patch
youre investigating a subway accident in which a train derailed while rounding an unbanked curve of radius 132 m and
a charge of 5.85 microc resides at the origin. a what is the flux through any gaussian surface enclosing this charge? b
A mine elevator is supported by a single steel cable 2.8 cm in diameter. The total mass of the elevator cage and occupants is 520 kg. By how much does the cable stretch when the elevator hangs by (a) 13 m of cable and (b) 364 m of cable? (Neglect the..
A block is released from rest at the top of a frictionless ramp (inclined plane) that makes an angle of 25° with respect to horizontal. What is the length of the ramp D1
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