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Picture yourself in the castle of Helm’s Deep from the Lord of the Rings. You are on top of the castle wall and are dropping rocks on assorted monsters that are 16.15 m below you. Just when you release a rock, an archer located exactly below you shoots an arrow straight up toward you with an initial velocity of 47.9 m/s. The arrow hits the rock in midair. How long after you release the rock does this happen?
A 0.200 kg projectile is fired with a velocity of +745m/s at a 2.0kg wooden block that rests on a frictionless table. The velocity of the block, immediately after the projectile passes through it, is +45 m/s. Find out the velocity with which the p..
You have available lenses of focal lengths 2.0 cm, 4.0 cm, 8.0 cm, and 16.0 cm. what is the maximum magnification you could achieve
A passenger on a stopped bus notices that rain is falling vertically just outside the window. Find the speed of the raindrops, given that the bus is moving with a speed of 17.2 m/s
A 105 kg fullback is running at 4.8 m/s to the east and is stopped in 0.75 s by a head-on tackle by a tackler running due west. Calculate the average force exerted on the tackler
A potter's wheel ( a solid uniform disk) of mass 6.1 kg and radius 0.65 m spins about its central axis. Calculate the moment of inertia of the system
Two disks are rotating about the same axis. Disk A has a moment of inertia of 3.67 kg·m2 and an angular velocity of +3.04 rad/s. What is the moment of inertia of disk B
You plan to throw stones by using a sling of length 0.5 m which you whirl over your head. Suppose you wish to throw a stone a distance of 27 m. What must be the centripetal acceleration of the stone
a 50 cm long solenoid has 100 turns of wire and carries a current of .95 A. it has a ferromagnetic core completely filling its interior where the field is .71 T. find the relative magnetic permeability of the material
An equipotential surface that surrounds a point charge q has a potential of 585 V and an area of 1.27 m2. Determine q
An old-style TV set places 50 kV across two plates of a parallel plate capacitor. An electron is released very close to one plate, find the speed of the electron when it exits the hole in the plate
A negative charge of -0.55 uC exerts an upward 0.200N force on an unknown charge 0.300m, What is the unknown charge (magnitude and sign)
An open railroad car of mass 2496 kg is coasting with an initial speed of 17 m/s on a frictionless, horizontal track. How much water (in kilograms) has accumulated in the car
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