Chapter 5b Lecture

Chapter 5b Lecture - General Physics I Durig Lewis Question...

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Unformatted text preview: General Physics I Durig Lewis Question A ball, which is rolling along a table with a speed of 4 m/s, rolls off of the end of the table and falls to the floor. What is the ball’s speed (the magnitude of its velocity) the instant before it strikes the floor? a) 4.0 m/s b) 4.4 m/s c) 6.0 m/s d) 39 m/s e) None of the above 4 m/s 1.0 m Answer A ball, which is rolling along a table with a speed of 4 m/s, rolls off of the end of the table and falls to the floor. What is the ball’s speed (the magnitude of its velocity) the instant before it strikes the floor? Vertical Motion 4 m/s 1.0 m / y v m s = ? y v = 1.0 y m = y m = 2 9.81 / y a m s = - t Don't Care = x y Answer A ball, which is rolling along a table with a speed of 4 m/s, rolls off of the end of the table and falls to the floor. What is the ball’s speed (the magnitude of its velocity) the instant before it strikes the floor? Vertical Motion / y v m s = ? y v = 1.0 y m = y m = 2 9.81 / y a m s = - t Don't Care = t a v v y y y + = t v v y y y y ) ( 2 1 + + = 2 2 1 t a t v y y y y + + = ) ( 2 2 2 y y a v v y y y- + = Answer A ball, which is rolling along a table with a speed of 4 m/s, rolls off of the end of the table and falls to the floor. What is the ball’s speed (the magnitude of its velocity) the instant before it strikes the floor? Vertical Motion / y v m s = ? y v = 1.0 y m = y m = 2 9.81 / y a m s = - t Don't Care = ) ( 2 2 2 y y a v v y y y- + = 2 2 2( 9.81)(0 1) y v = +-- 4.429 / y v m s = - Answer A ball, which is rolling along a table with a speed of 4 m/s, rolls off of the end of the table and falls to the floor. What is the ball’s speed (the magnitude of its velocity) the instant before it strikes the floor?...
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Chapter 5b Lecture - General Physics I Durig Lewis Question...

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