A sprinter who weighs 639 N runs the first 8.6 m of a race in 1.9 s, starting from rest and accelerating uniformly. What are the sprinter's (a)speed and (b) kinetic energy at the end of the 1.9 s? (c) What average power does the sprinter generate during the 1.9 s interval?

Q: A hummingbird has a mass of about 1.7 g. Suppose a hummingbird does 0.15 J of work against gravity,…

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Q: A helicopter, starting from rest, accelerates straight up from the roof of a hospital. The lifting…

A: Given:            m = 800 kg            v   = 7.5 m/s            h  = 8.7 m            t   =  4 s…

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A: (a) Calculate the runner's kinetic energy at this instant. KE=12×Mass of runnerm×Speed of the…

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A: The kinetic energy of the object at the top most point is zero. The total energy of the object at…

Q: Renatta Gass is out with her friends. Misfortune occurs and Renatta and her friends find themselves…

A: Force, F = 1650 NDisplacement,d = 100 mWork, W = ?

Q: A helicopter, starting from rest, accelerates straight up from the roof of a hospital. The lifting…

A:

Q: The engine of a Honda Civic has a power of 1.32 x 105 W (176.88 hp).   a) How much work does this…

A: Power is defined as the energy transferred per unit time. Since this energy is consumed in work…

Q: 4. A fighter jet is launched from an aircraft carrier with the aid of its own engines and a steam-…

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Q: An asteroid is moving along a straight line. A force acts along the displacement of the asteroid and…

A: (given)      Mass of an asteroid = 5.8Initial speed of asteroid = 6700 m/s Final speed of asteroid =…

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Q: A 5.0 N projectile leaves the ground with a kinetic energy of 220 J. At the highest point in its…

A: The difference between the kinetic energies is,

Q: How much work must you do to push a 12 kg block of steel across a steel table at a steady speed of…

A: mass of block of steel (m) = 12 kg constant speed (v) = 1.3 mstime (t) = 7.7 seconds μk = 0.6

Q: Someone takes 15 minutes to walk up a hill 100 m high. His weight is 600 N. How much work did he do…

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Q: An object of 1.0 kg mass is pulled up an inclined plane by a constant force of 10 N that causes a…

A: Write the net force on the mass.

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Q: A 1200-kg sports car is advertised to accelerate from 0-100 km/h (27.78 m/s) in 3.00 s. What is the…

A: Solution

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A: Mass of the barbell is m = 100 kg Height of the barbell after lifting it is H = 0.800 m