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John is sitting ( at rest) at the top of a slide that is inclined 25 deg with respect to the horizontal. After travelling 5.0 m, (the length of the slide), John's speed at the bottom of the slide is 5.4m/s. Assume that the friction is not negligible in this situation. If John's mass is 25 kg, how much does the thermal energy increase during John's trip down the slide?
A high-speed lifting mechanism supports a 880-kg object with a steel cable that is 39.0 m long and 4.00 cm2 in cross-sectional area. Determine the elongation of the cable
In the last seconds of the championship basketball game, a 7 ft center's team is down by 2 points. He must make a 3 point shot to win the game. He is standing on the 3 point shot line.
A hammer is hanging by a light rope from the ceiling of a bus. The ceiling of the bus is parallel to the roadway, What is the acceleration of the bus
A person weighs 670N steps onto a spring scale in the bathroom, and the spring compresses by 0.79 cm. What is the spring constant? And what is the weight of another person who compresses the spring by 0.34 cm.
The car encounters a loop of radius R = 18 m at ground level. As you will learn in the course of this problem, the initial height 54.00 m is great enough so that the car never loses contact with the track.
A skier is slinding downhill at 11 m/s when she reaches an icy path on which her skies more freely with negligible friction. find the speed of the skier at the bottom of the icy path
How many kcal of heat must be withdrawn from 4.56 kg of steam at 125°C to change it to ice at -44.5°C.
The bucket is released from rest at the top of a well and falls a distance 10.3 to the water. You can ignore the weight of the rope.
Photons of wavelength 490 nm are incident on a metal. What is the work function of the metal
24.0g of copper pellets are removed from a 300 ? C oven and immediately dropped into 120mL of water at 24.0 ? C in an insulated cup. What will the new water temperature be
You are asked to design a spring that will give a 1310-kg satellite a speed of 3.50 m/s relative to an orbiting space shuttle, What must the force constant of the spring be
A ship sets out to sail to a point 156 km due north. An unexpected storm blows the ship to a point 118 km due east of its starting point. How far should it now sail to reach its original destination.
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