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A catapult on a cliff launches a large round rock towards a ship on the ocean below. The rock leaves the catapult from a height H of 33.0 m above sea level, directed at an angle above the horizontal with an unknown speed v0. The projectile remains in flight for 6.00 seconds and travels a horizontal distance D of 175 m. Assuming that air friction can be neglected, calculate the value of the angle (in degrees). To what height above sea level does the rock rise?
A person having a mass of 59.1 kg stands before a flight of 30 stairs each of which is 25 cm high. How much work did he do in overcoming gravity
The moon is at a mean distance Dm = 3.84 x 10^5km from the earth; the sun is at a mean distance Ds = 1.496 x 10^8km. The radius of the moon is Rm = 1.74x10^3km; the radius of the sun is Rs = 6.96 x10^5km.
A circuit with 2 capacitors, C1 = 22.0 ?F and C2 = 16.0 ?F, are hooked up in parallel to each other, Calculate how much energy each capacitor can store
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
A block of weight 43.6 N is hanging from a rope. The tension from the rope is pulling upward on the block. What is the magnitude of the tension in the rope
A sled starts up an incline of 350 with the horizontal. The sled starts from the bottom with an initial velocity of 5 m/s. (a) How far u p the incline does it go? A second sled starts to slide from the top when the first sled starts to slide down...
By how much horizontal force would you need to apply to a 3.0 N plastic calculator to start it moving from rest? How much horizontal force would you need to keep it moving?
ou place it in water and it displaces a volume of 20 cubic centimeters of water. What is the hardness of this mineral? describe your answer.
Hot water at 90 degrees C is poured into a large Styrofoam cup that contains water at 20 degrees C. calculate the ratio of cold water to hot that would give this result. Start with energy conservation: Q(H) + Q(C) = 0
A ball and bat, approaching one another each with the same speed of 1.3 m/s collide. Find the speed of the ball after the collision
At a time t = 2.60s , a point on the rim of a wheel with a radius of 0.180m has a tangential speed of 55.0m/s as the wheel slows down, Calculate the wheel's constant angular acceleration
Particle A and particle B are held together with a compressed spring between them. When they are released, the spring pushes them apart, and they then fly off in opposite directions, what are the kinetic energies of each particle
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