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3 years ago

11

Use your data to predict what a 400g bag would weigh.

1 answer:

Kobotan [32]3 years ago

6 0

3.92N

Explanation:

Given mass:

Mass of bag = 400g

The mass of a substance is the amount of matter it contains.

Weight of a substance is the vertical force acting on a body in the presence of gravity.

Weight = mass x gravity

Since the mass of the bag is 400g;

Now we convert to kg

1000g = 1kg

400g = $\frac{400}{1000}$ = 0.4kg

Weight of bag = 0.4kg x 9.8m/s²

Weight of bag = 3.92N

learn more:

Weight and mass brainly.com/question/5956881

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Part a)

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Part b)

$\theta = -137.7 degree$

Part c)

$\theta = -127.7 degree$

Explanation:

As we know that acceleration is rate of change in velocity of the object

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Part a)

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Now the acceleration of the object is given as

$\vec a = (-18t)\hat i + (-18)\hat j$

at t= 1.1 s we have

$\vec a = -19.8 \hat i - 18 \hat j$

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$\vec F = (0.29 kg)(-19.8 \hat i - 18 \hat j)$

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Part b)

Direction of the force is given as

$tan\theta = \frac{F_y}{F_x}$

$tan\theta = \frac{-5.22}{-5.74}$

$\theta = -137.7 degree$

Part c)

For velocity of the particle we have

$v_x = \frac{dx}[dt}$

$v_x = (0 +1 - 9t^2)$

$v_y = \frac{dy}{dt}$

$v_y = (0 +7 - 18t)$

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$\vec v = -9.89\hat i - 12.8 \hat j$

now the direction of the velocity is given as

$\theta = tan^{-1}(\frac{v_y}{v_x})$

$\theta = tan^{-1}(\frac{-12.8}{-9.89})$

$\theta = -127.7 degree$

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Dima020 [189]

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