A boulder released by a rockslide rolls 60 m in 4 s. What is its average speed?

Physics

1 answer:

Gelneren [198K]3 years ago

5 0

Answer:

15 m per second

900m per minute

54,000 per hour

Explanation:

60 divided by 4 to get per second then times 60 for per minutes

then times 60 to get per hour

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An experiment is carried out to measure the extension of a rubber band for different loads.

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Complete question is;

An experiment is carried out to measure the extension of a rubber band for different loads.

The results are shown in the image attached.

What figure is missing from the table?

Answer:

17.3 cm

Explanation:

The image attached showed values for load, extension and initial length.

Now, the first length there is 15.2 cm and as such it's corresponding extension is 0 because it has no preceding measured length.

The second measured length is 16.2 cm. Since it's initial measured length is 15.2 cm, then the extension has a formula; final length - initial length.

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This corresponds to what is given in the table.

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Thus;

2.1 cm = Final length - 15.2 cm

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