A ball with a mass of $9 k g$ $9 kg$ moving at $14 \frac{m}{s}$ $14 m/s$ hits a still ball with a mass of $18 k g$ $18 kg$ . If the first ball stops moving, how fast is the second ball moving?

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A ball with a mass of $9 k g$ $9 kg$ moving at $14 \frac{m}{s}$ $14 m/s$ hits a still ball with a mass of $18 k g$ $18 kg$ . If the first ball stops moving, how fast is the second ball moving?

2 Answers

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Answer 1 · 2015-12-23T03:45:31

If the second ball is in rest before collision then after collision velocity of the second ball is 7m/s.

Answer 2 · 2015-12-23T04:23:28

$7$ $7$ $m$ $m$ / $s$ $s$

Explanation:

$M_{1}$ $M_1$ = mass of first ball, $V_{1}$ $V_1$ = velocity of first ball
$M_{2}$ $M_2$ = mass of second ball, $V_{2}$ $V_2$ = velocity of second ball

by conservation of linear momentum

$M_{1} V_{1} + M_{2} V_{2} = M_{1} V_{1} + M_{2} V_{2}$ $M_1V_1 +M_2V_2=M_1V_1+M_2V_2$

9 x 14 + 18 x 0 = 9 x 0 + 18 x $V_{2}$ $V_2$

therefore $V_{2}$ $V_2$ = $\frac{9 x 14}{18}$ $(9 " x " 14)/18$ = $7$ $7$ $m$ $m$ / $s$ $s$

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A ball with a mass of $9 k g$ $9 kg$ moving at $14 \frac{m}{s}$ $14 m/s$ hits a still ball with a mass of $18 k g$ $18 kg$ . If the first ball stops moving, how fast is the second ball moving?

2 Answers

Explanation:

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Science

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Humanities

... and beyond

A ball with a mass of 9kg9 kg moving at 14ms14 m/s hits a still ball with a mass of 18kg18 kg. If the first ball stops moving, how fast is the second ball moving?

2 Answers

Explanation:

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Impact of this question

A ball with a mass of $9 k g$ $9 kg$ moving at $14 \frac{m}{s}$ $14 m/s$ hits a still ball with a mass of $18 k g$ $18 kg$ . If the first ball stops moving, how fast is the second ball moving?