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प्रश्न
A block of mass m is taken from A to B slowly under the action of a constant force R Work done by this force is ______.
विकल्प
FR
`pi/2`FR
`"FR"/sqrt2`
`"FR"/4`
MCQ
रिक्त स्थान भरें
उत्तर
A block of mass m is taken from A to B slowly under the action of a constant force R Work done by this force is FR.
Explanation:
A block of mass m is taken from A to B under constant force F.
∴ work done W = `vec"F"⋅vec"d"`
WAB = `vec"F"_x⋅vec"R"_x + vec"F"_x⋅vec"R"_y`
= FR cos 0° + FR cos 90°
⇒ WAB = FR
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