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Igoryamba
3 years ago
14

Which of the following statements about rest and physical activity is NOT true?

Physics
1 answer:
Marta_Voda [28]3 years ago
8 0

Answer: Option (a) is the correct answer.

Explanation:

Physical activity is an activity in which work is done by our body. When we take rest, then our body feels refreshed and as a result, the efficiency to do more work is achieved by our body.

Hence, it is required to take some rest while training or workouts etc to regain the strength and avoid any kind of injury.

Whereas when we take little rest then our body feels exhausted. As a result, we should take adequate rest in order to work properly.

Thus, we can conclude that the statement you should rest as little as possible because it interferes with training is NOT true about rest and physical activity.

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Vector A has y-component Ay= +15.0 m . A makes an angle of 32.0 counterclockwise from the +y-axis. What is the x component of A?
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Answer:

x-component=-9.3 m

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Explanation:

We are given that

A_y=+15 m

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According to question

A_y=\mid A\mid cos\theta

Substitute the values then we get

15=\mid A\mid cos32

\mid A\mid =\frac{15}{cos32}=\frac{15}{0.848}

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tan\theta=\frac{perpendicular\;side}{Base}

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0.62\times 15=A_x

A_x=9.3

The value of x-component of A is negative because the vector A lie  in second quadrant.

Hence, the x- component of A=-9.3 m

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