Saturday

August 30, 2014

August 30, 2014

Posted by **justine** on Monday, September 17, 2012 at 11:30am.

a. derive a formula for the time at w/c the ball hit the ground

b. use the formula to prove that the impact velocity by the ball is -Vo

- math -
**Steve**, Monday, September 17, 2012 at 11:33amh(t) = Vot - 1/2 a t^2

= t(Vo - a/2 t)

h=0 when t=0 or t=2Vo/a)

v(t) = Vo - at

at t=2Vo/a, v = Vo - a(2Vo/a) = -Vo

Makes sense, since the ball falls just as far as it rises.

**Related Questions**

physics - A ball is thrown vertically upwards, from ground level, with an ...

Physics - A ball is thrown from ground level up in the air at 61m/s. How fast is...

Math- - A ball is thrown vertically upward with an initial velocity of 96 feet ...

Physics - A ball is thrown vertically upward with a speed of 25.0 m/s from a ...

cal - A ball is thrown directly upward from ground level with an initial ...

physics - 2. A ball is thrown vertically upward from the 15m level in an ...

Algebra 2 - If an object is thrown vertically upward with an initial velocity of...

Algebra - If an object is thrown vertically upward with an initial velocity of ...

physics - two students are on a balcony 20.6 m above the street. One student ...

physics - two students are on a balcony 20.6 m above the street. One student ...