Saturday

October 25, 2014

October 25, 2014

Posted by **Isis** on Thursday, November 29, 2012 at 6:22pm.

a) what is the initial velocity of the ball?

b) how long does it take for the ball to reach its maximum height?

c) what is the final velocity of the ball? if i returns to where it was thrown from?

- physics -
**Jennifer**, Friday, November 30, 2012 at 6:15pmy = y0 + v0*t - 1/2*g*t^2

where y0 is the initial height = 0, v0 is the initial speed, and g is the acceleration due to gravity, t is time, and y is the vertical position.

The ball reaches it's maximum height when dy/dt = 0 = v0 - g*t

and y = 5, so

5 = v0*t - 1/2*g*t^2

Use algebra to find the initial velocity and time.

The final velocity of the ball is given by

1. v = v0 - g*t, occurs when y = 0, or when

2. 0 = v0*t - 1/2*g*t^2

solve 2nd equation for t, and plug into 1st equation to solve for the final speed v at this time.

**Answer this Question**

**Related Questions**

phy - A blue ball is thrown upward with an initial speed of 20.6 m/s, from a ...

physics - A ball rolls along a desktop with an uniform velocity of 3 m/s. What ...

physics - A ball rolls along a desktop with an uniform velocity of 3 m/s. What ...

physics : HELP PLEASE - A ball rolls along a desktop with an uniform velocity of...

physics : HELP PLEASE - A ball rolls along a desktop with an uniform velocity of...

physics - if ball is thrown upward with a initial velocity of 38.5 m/s and the ...

Math - The height(H) of an object that has been dropped or thrown in the air is ...

Physics - A red ball is thrown down with an initial speed of 1.3 m/s from a ...

physics - A red ball is thrown down with an initial speed of 1.2 m/s from a ...

physics - a ball is thrown at an initial angle of 37 and initial velocity of 23....