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Q. Eight books, each 3.90 cm thick with mass 1.70 kg, lie flat on a table. How much work is required to stack them on top of each other?
Q. Children in a tree house lift a small dog in a basket 5.5m up to their house. If it takes 191 J of work to do this, what is the combined mass of dog and basket?
find the x and y components of the shell.
A baseball pitcher throws a fastball at a speed of 45.00m/s. The acceleration occurs as the pitcher holds the ball in his hand and moves it throughout an almost straight-line distance of 4.0 m. compute the acceleration; assume that it is constant ..
Two carts on a frictionless air track are made to travel toward each other. As they collide they stick together. if the cart on the left has a mass of 250 grams and is moving at 0.2 meters per second to the right.
An 800 g ball moves in a vertical circle on a 1.07-m-long string. If the speed at the top is 5-m/s, after that the speed at the bottom would be 8.18 m/s.
A 71 kg skier encounters a dip in the snow's surface that has a circular cross section with a radius of curvature of 12 m. If the skier's speed at point A is 7.0m/s , what is the normal force exerted by the snow on the skier at point B? Ignore fricti..
A 80 kg football player stand at the end of a uniform 8m, 50kg diving board supported as shown. Determine the forces exerted by the two supports.
A "door closer" is attached to the door and the top of the door frame.When the door is open and at rest, the door closer exerts a torque of 4.8 {rm N} cdot {rm m}. What is the least force that you need to apply to the door to hold it open.
Calculate the magnetic field at the observation location. The space shuttle releases a satellite into the circular orbit 565 above the Earth. How fast must the shuttle be moving (relative to Earth) when the release occurs.
Assume you wish to send a 200 bytes long message from your equipment to a friend's machine via four intermediate nodes. You are needed to use a header size of 5 bytes per packet.
A stone is dropped at t = 0. A second stone, with 6 times the mass of the first, is dropped from the equivalent point at t = 59 ms. (a) How far below the release point is the center of mass of the two stones.
A person with a mass of 103 kg is standing on a scale that reads weight in newtons inside of an elevator. If the elevator accelerates upward at 3.2 m/s2, what does the scale read.
The critical angle for a special type of glass in air is 41.8. The index of refraction for water is 1.33. What is the critical angle if glass is immersed in water.
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