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2 years ago

12

How can I start studying physics myself? Please be specific, such as recommended series or books. BOUNTIFUL REWARD FOR PROPER AN

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1 answer:

Dmitriy789 [7]2 years ago

3 0

BYJU’S app trust me it very helpful I used to suck at it but now I’m the topper of the class

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Which statement is true?

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A student tries to produce notes of higher frequency by blowing a trumpet harder. he will succeed?

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A 2-kg wood block is pulled by a string across a rough horizontal floor. The string exerts a tension force of 30 N on the block

Luden [163]

Answer:

Work done, W = 84.57 Joules

Explanation:

It is given that,

Mass of the wooden block, m = 2 kg

Tension force acting on the string, F = 30 N

Angle made by the block with the horizontal, $\theta=20^{\circ}$

Distance covered by the block, d = 3 m

Let W is the work done by the tension force. It can be calculated as :

$W=F\ cos\theta\times d$

$W=30\times cos(20)\times 3$

W = 84.57 Joules

So, the work done by the tension force is 84.57 Joules. Hence, this is the required solution.

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2 years ago