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After sliding down a snow-covered hill on an inner tube, Ashley is coasting across a level snowfield at a constant velocity of +2.8 m/s. Miranda runs after her at a velocity of +4.4 m/s and hops on the inner tube. How fast do the two of them slide across the snow together on the inner tube? Ashley's mass is 70 kg and Miranda's is 55 kg. Ignore the mass of the inner tube and any friction between the inner tube and the snow.
A student decides to move a box of books into her dormitory room by pulling on a rope attached to the box, Find the acceleration of the box
A long string with a mass/length of 500 g/m is placed under a tension of 400 N, What is the wavelength of the resulting wave and What is the wave speed
A helicopter, starting from rest, accelerates straight up from the roof of a hospital. The lifting force does work in raising the helicopter. What is the average power generated by the lifting force
a wheel 2cm wide with a 3.5cm radius is being spun at a constant velocity "w" by a static force "F", how much work is being 'lost' through the bar
One afternoon, a couple walks three-fourths of the way around a circular lake, the radius of which is 1.08 km. What is the direction (relative to due east) of the couple's displacement
Consider a straight wire with a radius A, carrying a current I, Use Ampere's law to calculate the magnetic field around the wire as a function of r, the distance from the center
The drawing shows a person (weight W = 582 N, L1 = 0.841 m, L2 = 0.406 m) doing push-ups. Find the normal force exerted by the floor on each hand
When a certain paramagnetic material is placed in an external magnetic field of 1.50T , The magnetic permeability of this material is
A 1000-kg cart is rolling to the right at 5m/s. A 75-kg man is standing on the right end of the cart. What is the speed of the cart if the man suddenly starts running to the left with a speed of 10.00m/s relative to the cart.
A 23 bullet traveling 240 penetrates a 4 block of wood and emerges going 170. If the block is stationary on a frictionless surface when hit, how fast does it move after the bullet emerges.
A 140 g, 90.0 mph fastball comes across the plate very nearly horizontally and is batted at 90.0 mph at a 30.0 degree angle (above the horizontal) toward center field. Determine the impulse (in N's) acting on the ball
A water storage is filled with freshwater to a depth of 6.4m. It has a circular basin with an Area of 30m^2, What is the weight (force) of the water the basin supports
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