(a) to As along accelerati at Determine the 3 second after (b) Potential Bf Shown Figure Straight (C) Assume. is Just 1-X -1 a that Brifly explain relation Ship energy. (GPE) and 20 meters the Q4, a train truck 2 with 60/v" m/5² before it Fig (4) velocity (U) and position accelaration ů droped dropped is traveling mls. it starts . lokg weight Wat kept at hight above the ground. Now this block. between gravitional kinetic energy (KE) find the Velocity of the block. hits the ground,

Dr. John Paul Stapp was U.S. Air Force officer who studiedthe effects of extreme deceleration on the human body. OnDecember 10, 1954, Stapp rode a rocket sled, acceleratingfrom rest to a top speed of 282 m/s (1015 km/h) in 5.00 s, andwas brought jarringly back to rest in only 1.40 s! Calculate his(a) acceleration and (b) deceleration. Express each inmultiples of g (9.80 m/s2) by taking its ratio to theacceleration of gravity.

Imagine that we had two electrons that were initially VERY far apart, moving towardeach other at nearly the speed of light, roughly 3 x 108 m/s. How close can they get to each other?

To decide who pays for lunch, a passengeron a moving train tosses a coin straight upward with an initialspeed of 5.25 m>s and catches it again when it returns to its initial level. From the point of view of the passenger, then, the coin’sinitial velocity is 15.25 m>s 2yn . The train’s velocity relative to theground is 112.1 m>s2xn . (a) What is the minimum speed of the coinrelative to the ground during its flight? At what point in the coin’sflight does this minimum speed occur? Explain. (b) Find the initial speed and direction of the coin as seen by an observer on theground. (c) Use the expression for ymax derived in Example 4-14 tocalculate the maximum height of the coin, as seen by an observeron the ground. (d) What is the maximum height of the coin fromthe point of view of the passenger, who sees only one-dimensionalmotion?

A young-looking woman astronaut has just arrived homefrom a long trip. She rushes up to an old gray-haired manand in the ensuing conversation refers to him as her son.How might this be possible?

A worker stands on top of a railroad car moving at constantvelocity and throws a heavy ball straight up (from his pointof view). Ignoring air resistance, explain whether the ballwill land back in his hand or behind him.

An electron in a TV tube is beamed horizontallyat a speed of 5 * 106 m/sec toward the face of the tube40 cm away. About how far will the electron drop before it hits?

calculate the reverberation time at 500hz for a conference room that is 12 ft wide, 20 ft long and 12 ft high. It has a carpeted floor, curtains on both sides, plasterboard (or equivalent) short sides, and a plasterboard ceiling. what will the reverberation tiume be if it is occupied by twenty people in comfortable upholstered seats?

An electron, initially at rest, is accelerated through a potentialdifference of 600 V as shown. What is the maximum kinetic energy ofthe electron?

An electron is electrically accelerated inside a region of length 1.4 cm. It enters the region with an initial velocity of 4.3 × 105 ms-1 , and emerges with a velocity of 8.9 × 106 ms-1. Calculate the acceleration of the electron, assuming it is constant.