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A person jumps from a second floor window and lands on her feet. Using the concepts of work and the conservation of energy, find the average force that is applied by her legs on landing.
A 52.5 g Super Ball travelling at 30 m/s bounces off a brick wall and rebounds at 16.0 m/s. A high-speed camera records this event. If the ball is in contact with wall for 3.25 ms, what is the magnitude of the average acceleration of ball during t..
Two cars collide at an icy intersection and stick together afterward. The first car has a mass of 1600 kg and was approaching at 7.00 m/s due south. Calculate the final velocity of the cars
deepas uncle was surprised to see the fast changes in the world. he is not so educated. he asked deepa to tell him the
one of your classmate has a friend with a boat. here is your classmate on water-skis being towed. what is the friction force of the water
The exhaust temperature of a Carnot heat engine is 250°C, What is the intake temperature if the efficiency of the engine is 27.0%
A certain fluid has a density of 1080 kg/m3 and is observed to rise to a height of 1.8 cm in a 1.0-mm-diameter tube. Calculate the surface tension of the fluid
A piece of wire carries a current I along the x-axis and sits in a magnetic field with field lines in the y-direction. What is the direction of the Lorentz Law
A park merry-go-round consists of a 220 kg circular wooden platform 3.90 m in diameter. What is the kinetic energy of the merry-go-round
An airplane moves 140 m/s as it travels around the vertical circular loop which has a 1 km radius. What is the magnitude of the resultant force on the 70 kg pilot of this plane at the bottom of this loop.
an object is solid throughout. when the object is completely submerged in ethyl alcohol its apparent weight is 15.8 n.
A fish takes the bait and pulls on the line with a force of 2.1 N. How much line does the fish pull from the reel in 0.28 s
Heat Q flows spontaneously from a reservoir at 445 K into a reservoir at 265 K. Because of the spontaneous flow, 2620 J of energy is rendered unavailable for work when a Carnot engine operates between the reservoir at 265 K and a reservoir at 248 K. ..
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