3 years ago

Calculate the average speed between seconds 1 and 4 PLS HELP MEEEEEEEEE

Physics

1 answer:

sesenic [268]3 years ago

3 0

Answer:

8.7

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

Dmitry [639]

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

Constant rate of speed = 0.20 m/s²

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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4 years ago

What is it called the number that tells how much of something there is

Dvinal [7]

A cardinal númber is a number that says how many of something there are such a one , two , three , four , five

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3 years ago

When a wire loop is connected to a battery, what is produced in the loop?

Vinil7 [7]

Answer:

magnetic field

Explanation:

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3 years ago

Wнιcн deмonѕтraтeѕ condυcтιon

jekas [21]

C.) cool feet walking across a hot pavement.

The reason because the other ones deals with radiation. Only C.) is the right answer because the feet is touching the hot pavement which is conduction.

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4 years ago

Which of the following is the reason that a fixed pulley makes work easier?

kherson [118]

<u>Answer</u>

A fixed pulley is one of many simple machines that can make work easier. In the fixed pulley system, we pull down on one side of the rope and the other side goes up. Here the pulley can change the direction of force on a rope or belt that moves along its circumference.
we use the same amount of force to pull down as we lift the toy ourselves.

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3 years ago