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the current in a 30 meter wide river is 3 m/s towards the north. If you need to move straight across the river and you can swim at 4 m/s: in what direction should you head? how long does it take to cross river? how far downstream do you reach the shore?
A 81.0-kg daredevil exhibitionist hangs on to the end of a long bungee cord attached to the railing of the Brooklyn Bridge and oscillates vertically, What is the frequency of oscillation
A brick of mass 1.21 kg is attached to a thin (massless) cable and whirled around in a circle in a vertical plane. What is the maximum speed the brick can have at the bottom of the circle before the cable will break
The minimum distance required to stop a car moving at 34 mi/h is 42 ft. What is the minimum stopping distance for the same car moving at 64.0 mi/h, assuming the same rate of acceleration.
Calculate the angular velocity the flywheel must have to contain enough energy to take the bus from rest to a speed of 27.0 m/s, assuming 83.0% of the rotational kinetic energy can be transformed into translational energy
Translational equilibrium occurs when an object moves with constant velocity or is at rest resulting in an acceleration of magnitude equal to zero. Which law(s) governs this relationship
Presume that you loft the ball with the initial speed of v = 17.6m/s, at an angle of θ = 50.7° above the horizontal. At this instant your opponent is d = 11.19m away from the ball. He begins moving away from you 0.35s later, hoping to reach the ba..
A spaceship of proper length 310 m takes 0.79 µs to pass an Earth observer. Determine the speed of this spaceship as measured by the Earth observer
A 15.0kg bucket of water is suspended by a rope of negligible weight that is wrapped around a solid cylinder 0.300m in diameter, What is the tension in the rope while the bucket is falling
While Voyager 2 sent back pictures of Neptune during its historic flyby of that planet in 1989, the spacecraft's radio signals travelled for 4 hours at the speed of light to reach Earth. How far away was the spacecraft.
What is the magnitude of the average force of the bat on the ball throughout the ball-bat contact.
What must be the mass m2 of the hanging block if it is to descend 11.0m in the first 3.00s after the system is released from rest
A piston, A, as shown below, has a diameter of 0.54cm. A second piston, B has a diameter of 3.7 cm. find the force, F, necessary to support the 500N weight in the absence of friction.
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