A ball of mass 4kg is raised vertically a distance of 2.5m...?

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A ball of mass 4kg is raised vertically a distance of 2.5m...?

If the ball is allowed to fall to the ground, what will its speed be the instant before it hits the ground?

2006-10-18 13:38:34 · 3 answers · asked by Daniel Black 1 in Science & Mathematics ➔ Physics

3 answers

work = force times distance.

After being raised, the ball has a potential energy equal to the work done on it. The fall will convert that PE to kinetic energy, according to

KE = 1/2 mv^2 ... so solve that for V and then plug in the numbers.

2006-10-18 14:07:51 · answer #1 · answered by Luis 4 · 0⤊ 0⤋

Speed = -32 mph/sec^2
What is the time it takes for it to hit the ground? I don't think you gave enough information.

2006-10-18 20:45:51 · answer #2 · answered by thewordofgodisjesus 5 · 0⤊ 0⤋

7m/s

2006-10-18 20:43:41 · answer #3 · answered by 7 · 0⤊ 0⤋