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Q. What is the force of air resistance on a 100 kg sky-diver who is falling with a constant acceleration of 4m/s/s?
Q. A 55.0 kg pole vaulter running at 8.0 m/s vaults over the bar. Assuming that the vaulter's horizontal component of velocity over the bar is 1.0 m/s and disregarding air resistance, how high was the jump?
A helicopter is rising at 4.60 m/s when a bag of its cargo is dropped. The bag falls for 2.50 s. (suppose that the positive direction is upward.)
Light with a wavelength of 4.5 x10-5 cm passes through a single slit and falls on a screen 100 cm away. If the slit is 0.015 cm wide, what is the distance from the center of pattern to first dark band.
What is coefficient of friction between chair and floor
What is acceleration of an object sliding down to plane
A tiger leaps horizontally from a 5.90 m high rock with a speed of 4.10 m/s. How far from the base of the rock will she land.
A square, single turn coil 0.20m on a side is placed with its plane perpendicular to a constant magnetic field. An emf of 18mV is induced in the coil winding as the area of the coil decreases at the rate of 0.10m2/S. What is the magnitude of the m..
assume the roller coaster (h1 = 37 m, h2 = 13 m, h3 = 30) passes point A with a speed of 3.10 m/s. If the average force of friction is equal to one third of its weight, with what speed will it reach point B? The distance traveled is 55.0 m.
An explorer in dense jungles of equatorial Africa leaves his hut. He takes 41 steps at an angle 45 north of east, then 81 steps at an angle 60 north of west, then 51 steps due south. Suppose his steps all have equal length. Save him from becoming ..
How long after the car passes point A does the radio experience a minimum in the net signal? suppose that the wavelength has the value found in part.
What is angular velocity of the cockroach-disk system
What was the speed of the car before impact
2.0 kg ball moving with a speed of 3.0 m/s hits, elastically, an identical stationary ball as shown. If the first ball moves away with angle 30° to the original path,
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