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1- A professional skier reaches a speed of 56 m/s on a 30degree ski slope. Ignoring friction, what was the minimum distance along the slope the skier would have had to travel, starting from rest.
2- A cannon of mass 1500kg fires a 10 kg shell with a velocity of 200m/s at an angle of 45degrees above the horizontal. Discover the recoil velocity of the cannon across the level ground.
3- A bucket in an old well is hoisted upward by a rope which winds up on a cylinder having a radius of .050 m. How many rev/s should the cylinder turn if the bucket is raised at a speed of 0.15m/s.
The drill pipe has an outer diameter of 75 mm, a wall thickness of 6 mm, and a weight of 0.8 kN/m. If it is subjected to a torque and axial load as shown.
mike jumps 1 m down onto a walkway. his downward motion stops in 0.020 seconds. if he forgets to bend his knees what force is transmitted to his leg bones
The earth's magnetic field is approximately 30 microTesla. An AC transmission wire carries a current of 10 A (RMS). What is the peak current in the wire? What is the maximum force per meter in the wire?
What is the greatest mass that can be accelerated upwards at 2.9 m/s2 if the stress in the cable is not to exceed the elastic limit of the cable, that is 2.2 108 Pa.
A rock is thrown vertically upward with a speed of 15.0m/s from the roof of a building that is 70.0m above the ground. What is the speed of the rock just before it strikes the ground
Compute the semi major axis of the star orbit
a lasik vision correction system uses a laser that emits 10 ns-long pulses of light each with 2.5 mj of energy. the
A cylindrical glass cup has mass m and height h. When the cup is full, it can hold a mass of water equal to 6m. Find the height of water in the cup
A 22.0 kg child slides down a slide that makes a 37.0° angle with the horizontal. At what angle from the horizontal is this force directed
A projectile of mass 0.1kg travelling horizontally through the air with speed v(t) experiences a drag force D(t) whose magnitude is given by: D(t)=0.001[v(t)]^2. Calculate the speed of the projectile
A race car rounds a curve at 59 m/s. The radius of the curve is 439 m, and the car's mass is 615 kg. (Assume the car's speed remains constant. What is the centripetal force acting on the car
the image of the moon is formed by a concave mirror whose radius of curvature is 4.52 meters at a time when the moons
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