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A 72.0 kg base runner begins his slideinto second base when he is moving at a speed of 4 m/s. The coefficient of friction between hisclothes and Earth is 0.70. He slides so that his speed is zero justas he reaches the base.
a) How much mechanical energy is lost due to friction acting on the runner?b) How far does he slide?
A baton twirler is twirling her baton in a horizontal circle at a rate of 3.35 revolutions per second. Calculate the induced EMF between the center and one end of the baton
A boy is standing on a frozen lake (i.e. no friction) holding a rope that is attached to his sled. He pulls on the rope and exerts a horizontal force of 5.2 N, What is the acceleration of the boy
A tennis ball is served horizontally at a height of 2.40 m, 12.0 mfrom a net that is 0.900 m high. (a) If it is to clear the net byat least 0.200m, what is its minimum initial velocity? (neglect airresistance) (b) if it clears the net by 0.200m, ..
A particular race car can cover a quarter mile track (402 m) in 6.20 s starting from a standstill. what horizontal force must the road exert on the tires
Thunder is heard 4.0 sec after the flash of lightning is observed. If the outside temperature is 15 degrees celsius, how far away was the lightning bolt
At a rock concert, a dB meter registered126dB when placed 2.8m in front of a loudspeaker on the stage. What was the power output of the speaker
A 2.60×104- rocket blasts off vertically from the earth's surface with a constant acceleration. How far is the rocket above the earth's surface when it breaks the sound barrier
Anelastic conducting material is stretched into a circular loop of15.0 cm radius. It is placed with itsplane perpendicular to a uniform 0.800T magnetic field. What emf is induced in the loop at that instant
Forensic scientists can measure the muzzle velocity of a gun by firing a bullet horizontally into a large hanging block that absorbs the bullet and swings upward. What was the original speed of this bullet
An energetic father stands at the summit of a conical hill as he spins his 21 child around on a 5.1 cart with a 2.1--long rope. The sides of the hill are inclined at 25 . He keeps the rope parallel to the ground, and friction is negligible. What rope..
A flat cylindrical grinding wheel is spinning at 2000 rpm (clockwise when viewed head-on) when its power is suddenly turned off. Normally, How much work was done by friction on the system
A particle of mass m is in an infinite square well of width L. determine the allowed energies for the system
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