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Advocard [28]
3 years ago
8

A motorcycle accelerates from a stop at a rate of 4m/s 2 for 20 seconds. It then continues at a

Physics
1 answer:
8_murik_8 [283]3 years ago
4 0

After 20 s, the motorcycle attains a speed of

\left(4\dfrac{\rm m}{\mathrm s^2}\right)(20\,\mathrm s)=80\dfrac{\rm m}{\rm s}

and it continues at this speed for the next 40 s. So at 45 s, its speed is 80 m/s.

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Answer:

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When you rub a plastic rod with fur, the plastic rod becomes negatively charged and the fur becomes positively charged. As a con
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4 0
3 years ago
17 copper wires of length l and diameter d are connected in parallel to form a single composite conductor of resistance R. What
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R = \frac{r}{17}

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Now if a single copper wire has same resistance then its diameter is D and it is given as

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now from above two equations we have

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D^2 = 17 d^2

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<span>First quarter rises at noon, sets at midnight</span>
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3 years ago
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