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Andrej [43]
4 years ago
14

A pendulum takes 6.0 seconds to swing through 5 complete cycles. What is the period of the pendulum?

Physics
1 answer:
photoshop1234 [79]4 years ago
6 0
When you look at this, you might not be sure which way to divide ...
Should you divide  6 by 5  or  5 by 6 ?

Here's a case where you can use your units to decide.

The question wants to know the 'period'.  That's a length of time,
so the answer needs to have units of time.

If you divide 'cycles' be 'time', you'll get  'cycles/second'.
That's Hz.  It's frequency, not time.

If you divide 'time' by 'cycles', you'll get 'seconds/cycle'.
That's time, and it's exactly the definition of 'period'.

            Period  =  (6 seconds) / (5 cycles)

                         =    (6 / 5)  seconds/cycle

                         =     1.2  seconds 
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Explanation:

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Camping equipment weighting 5000N is pulled across a frozen lake by means of a horizontal rope. There is a frictional force of 3
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Answer:

The work done by the campers is 4\times10^{5}\ J

(b) is correct option.

Explanation:

Given that,

Weight = 5000 N

Frictional force = 300 n

Distance = 1000 m

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We need to calculate the force

Using newton's law of motion

F-F_{\mu}=ma

F-300=\dfrac{5000}{10}\times0.20

F=\dfrac{5000}{10}\times0.20+300

F=400\ N

We need to calculate the work done

Using formula of work done

W=F\times d

Put the value into the formula

W=400\times1000

W=4\times10^{5}\ J

Hence, The work done by the campers is 4\times10^{5}\ J

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