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A rowboat with a mass of 94 kg carries a 61 kg rower and 34 kg of water that has accumulated in the bottom. It's drifting forward at 0.94 m/s when the rower scoops up 11 kg of water in a bucket of negligible mass and heaves it horizontally over the stern at a speed of 2.3 m/s relative to the boat. What is the subsequent speed of the boat? (Consider the speed of the water in the bucket given above to be measured with respect to the initial speed of the boat.) m/s
A scaffold of mass 44 kg and length 6.0 m is supported in a horizontal position by a vertical cable at each end. What is the tension in the cable closer to the painter
Two small frogs simultaneously leap straight up from a lily pad. Frog A leaps with an initial velocity of 0.676 m/s, what is the position and velocity of the other frog
A force that varies linearly with time according to a relation F = 4t N is applied to an object travelling with a speed of 16-m/s. If the force decelerates the object to a complete stop in 5s, determine the object's mass. Imagine the force is at f..
A beam of light is incident on a plane mirror at an angle of 30 degrees to the normal of the mirror. find the angle between the incident beam and reflected beam
A 2kg ball traveling to the right with a speed of 4 m/s collides with a 4 kg ball traveling to the left with a speed of 2 m/s. The total momentum of the two balls after the collision is what.
An arrow is shot vertically upward and then 2.06 s later passes the top of a tree 41.3 m high. How much longer will the arrow travel upward
Pilots can be tested for the stress of flying high-speed jets in a whirling "human centrifuge" which takes 1.0 min to turn through 20 complete revolutions before reaching its final speed. what was its final speed in rpm
A loudspeaker diaphragm is oscillating in simple harmonic motion with a frequency of 330 Hz, What is the magnitude of the maximum acceleration
A 352-kg motorcycle is accelerating up along a ramp that is inclined 30.0º above the horizontal. Find the magnitude of the motorcycle's acceleration
N identical resistors are connected in series. The resistance of one of them is equal to R. What is the equivalent resistance of all resistors
A 20 kg satellite has a circular orbit with a period of 2.8 h and a radius of 7.9 106 m around a planet of unknown mass. what is the radius of the planet
At the time of this book's printing, the U.S. national debt is about $10 trillion. If payments were made at the rate of $2 000 per second, how many years would it take to pay off the debt, assuming no interest were charged
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