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When an archer pulls an arrow back in his bow, he is storing potential energy in the stretched bow.
(a) Compute the potential energy stored in the bow, if the arrow of mass 4.50 10-2 kg leaves the bow with a speed of 37.0 m/s. Assume that mechanical energy is conserved.
(b) What average force must the archer exert in stretching the bow if he pulls the string back a distance of 30.0 cm?
A novice skier, starting from rest, slides down a frictionless 35° incline whose vertical height is 118 m. Explain how fast is she going when she reaches the bottom? Illustrate what was the initial speed of the arrow?
Every day our Earth receives 1.55×1022 J energy from the Sun. If we were able to use 1.05 percent of this energy to accelerate spaceships, how many missions would be possible in one year
Ricardo and Maria both move to the center of the canoe. Ricardo notices that the canoe moves a distance d = 0.37 m relative to a rock that is stationary in the water. What is Maria's mass in kg
You have a grindstone ( a disk) that is 80.0 kg, has a .349-m radius, and is turning at 104.0 rpm, Calculate the angular acceleration of the grindstone
A uniform disk of mass M = 1.6 kg and radius R = 0.18 m rotates counterclockwise at a constant rate of 36 rev/s about its central axis. Determine the radial acceleration of a point on its rim
Two conductors having net charges of +16.0 µC and -16.0 µC have a potential difference of 16.0 V between them. (a) Determine the capacitance of the system.
How much time does the stone take to reach the ground.
An airplane accelerates down a runway at 3.20 m/s2 for 32.8 s until is finally lifts off the ground. Determine the distance traveled before takeoff
A novice skier starting from rest slides down a frictionless 32 degree incline whose vertical height is 125 meters
You have 2 capacitors plus 1 resistor all hooked up in series. The value of R= 15 ohms and C1=C2= 1uf. Find the time constant T(tau)=RC
Bowling balls can be made from a vaiety of substances and are required to have a circumference of roughly 27.6 inches. calculate the thickness of the shell
A baseball is thrown horizontally at a speed of 43 m/s. When it reaches home plate, what is the horizontal component of its velocity
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