Homework Help: physics : HELP PLEASE

Posted by kim on Tuesday, November 8, 2011 at 8:01pm.

A ball rolls along a desktop with an uniform velocity of 3 m/s. What is the displacement after 10 seconds have passed?
A ball is thrown upward with an initial velocity of 18 m/s? What is the maximum height the ball reaches if the ball is assumed to leave from the ground?

A ball is dropped from a 35 m tall building. The ball takes how long to impact the ground?

physics : HELP PLEASE - drwls, Tuesday, November 8, 2011 at 8:07pm
(a) A ball rolls along a desktop with an uniform velocity of 3 m/s. What is the displacement after 10 seconds have passed?
D = V*t

(b) A ball is thrown upward with an initial velocity of 18 m/s?
Vo^2/2 = g H
Solve for height, H

(c) A ball is dropped from a 35 m tall building. The ball takes how long to impact the ground
35 = (g/2) t^2
Solve for time, t.

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