Using information about natural laws, explain why some car crashes produce minor injuries and others produce catastrophic injuri
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The kinetic energy of the ball is given by:
where m=5 kg is the mass of the ball and v=2 m/s is its speed. Substituting these numbers, we find the kinetic energy:
where m=5 kg is the mass of the ball and v=2 m/s is its speed. Substituting these numbers, we find the kinetic energy:
Answer:
The tension in the string is .
Explanation:
For a string with tension and linear density
carrying a transverse wave at speed
it is true that
solving for we get:
Now, the transverse wave covers the distance of 7.4mm in 0.88s, which means it's speed is
And it's linear density (mass per unit length) is
Therefore, the tension in the cord is
or in micro newtons