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A 2.0-kg block slides down a fixed, rough curved track. The block has a speed of 5.0 m/s after its height above a horizontal surface has decreased by 2.0 m. Assume the block starts from rest. What is the change in mechanical energy of the block caused by the force of friction during this descent?
A solid 11-kg cylinder rolls without slipping on a rough surface. find the kinetic energy due to rotation of the block about its center-or-mass
Two people pull as hard as they can on horizontal ropes attached to a boat that has a mass of 200 kg. If they pull in the same direction, the boat has an acceleration of 1.59 m/s2 to the right. If they pull in opposite directions, the boat has..
Consider an experiment where a subject lands during two conditions from a height of 0.2 m. During the first landing condition, the subject lands 'stiffly' (e.g., very little knee flexion).
A 5.5 %u03BCC point charge is placed in an external uniform electric field that has a magnitude of 68000 N/C
A racquetball with a diameter of 5.6 cm and a mass of 42 g is cut in half to make a boat for American pennies made after 1982. How many pennies can be placed in the racquetball boat without sinking it
The Earth moves in a very nearly circular path around the Sun over the course of one year. Express the speed of the Earth in astronomical units per year and in km s-1.
You know your mass is 62kg , but when you stand on a bathroom scale in an elevator, it says your mass is 90kg. What is the acceleration of the elevator
A 305 turn solenoid has a radius of 7.00 cm and a length of 24.0 cm. Find the inductance of the solenoid
What is difference between conducting and nonconducting charged sphere
A hypodermic syringe is attached to a needle that has an internal radius of 0.301 mm and a length of 3.05 cm. What must the pressure of the fluid in the syringe be in order to inject the solution at a rate of 0.253 mL/s
While fishing, you get bored and start to swing a sinker weight around in a circle below you on a 0.31-m piece of fishing line. What is the angle that the fishing line makes with the vertical
Five seconds later, the police officer leaves on her motorcycle, starts her stopwatch, and accelerates at 2 m/s^2 toward the car. According to her stopwatch, how many seconds until she catches the car
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