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A 2.960 kg block of wood rests on a steel desk. The coefficient of static friction between the block and the desk is ?s = 0.605 and the coefficient of kinetic friction is ?k = 0.305. At time t = 0, a force F = 10.8 N is applied horizontally to the block. State the force of friction applied to the block by the table at the following times: t=0, t>0. Consider the same situation, but this time the external force F is 21.8 N. Again state the force of friction acting on the block at the following times:t=0, t>0.
A hot-air balloonist, rising vertically with a constant velocity of magnitude = 5.00m/s , releases a sandbag at an instant when the balloon is a height = 40.0m above the ground, With what magnitude of velocity does it strike
When a 4.0 µF capacitor is connected to a generator whose rms output is 34 V, the current in the circuit is observed to be 0.40 A
A 32 ohm resistor is connected to four 1.5 Volt batteries. Find the joule heat loss per minute in the resistor if the batteries are connected in series
a gun has a spring constant of 10N/cm. when the gun is inclined upward by 30 degree to the horizontal a 10 g ball is shot to the height of 2 m above the muzzle of the gun
Calculate the resultant velocity of an airplane that normallyflies at 200 km/hr if it encounters a 50 km/hr tailwind. If itencounters a 50 km/hr head wind
A 62.5 skier is moving at 6.00 on a frictionless, horizontal snow-covered plateau when she encounters a rough patch 3.10 long. How fast is the skier moving when she gets to the bottom of the hill
If an object is moving with constant momentum ‹ 12, ?16, ?7 › kg · m/s, what is the rate of change of momentum
A uniform magnetic field of magnitude B = 0.020 T is in the positive y-direction. Determine the magnitude and direction of the magnetic force on each segment.
A wall in a house contains a single window. The window consists of a single pane of glass whose area is 0.18 m2 and whose thickness is 2.3 mm. what is the percentage lost by the window
A 199.9 kg satellite is in a circular orbit of 26,273 miles (42,300,000 m) in radius. What is the velocity (speed) of the satellite
A steam engine is operated in a cold climate where the exhaust temperature is -3oC. Calculate the theoretical maximum efficiency of the engine using an intake steam temperature of 100oC.
A stone is dropped from a balloon rising at 10 m/s and reaches the ground in 8 sec. How high was the balloon when the stone was dropped
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