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2 years ago

8

A boy travels 12km east wards to a point B and then 5km southwards to another point C. Calculate the difference between the magn

itude of the displacement of the boy and the distance travelled by him

1 answer:

shepuryov [24]2 years ago

7 0

The difference b/w the displacement and total distance traveled is 4km.

Explanation.

▪ total distance - displacement

= 17 km - 13 km

= 4 km...answer

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3 years ago

A pendulum is made by letting a 4 kg mass swing at the end of a string that has a length of 1.5 meter. The maximum angle that th

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Answer:

Approximately $7.8\; \rm J$ .

Explanation:

The change in the gravitational potential energy of the pendulum is directly related to the change in its height.

Refer to the sketch attached. The pendulum is initially at $\rm P_2$ . Its highest point is at $P_1$ . The length of segment $\rm BP_2$ gives the change in its height.

The lengths of $\rm AP_1$ and $\rm AP_2$ are simply the length of the string, $1.5\; \rm m$ . To find the length of $\rm BP_2$ , start by calculating the length of $\rm AB$ .

$\rm AB$ forms a leg in the right triangle $\rm \triangle AP_1B$ . Besides, it is adjacent to the $30^\circ$ angle $\rm P_1\hat{A}B$ . Its length would be:

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The length of $\rm BP_2$ would thus be

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The change in gravitational potential energy can be found with the equation

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$m$ is the mass of the object,
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3 years ago

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Answer:

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Explanation:

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2 years ago

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Answer:

4 m/s

Explanation:

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Answer:

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