Question

If car speed 120km/h and complete his target in 20 minutes find the work done by car?given force is 40 newton.

Answer 1

$\large{\underline{\underline{\mathfrak{Answer :}}}}$

• Work done by car is 799.2 kJ

$\rule{200}{0.5}$

$\underline{\underline{\mathfrak{Step-By-Step-Explanation :}}}$

Given :

• Speed = 120 km/h = 33.3
• Time (t) = 20 mins = 600 s
• Force (F) = 40N

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To Find :

• Work Done

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Solution :

We have formula for speed :

$\large{\boxed{\sf{Speed \: = \: \dfrac{Distance}{Time}}}} \\ \\ \implies {\sf{Distance \: = \: speed \: \times \: time}} \\ \\ \implies {\sf{Distance \: = \: 33.3 \: \times \: 600}} \\ \\ \implies {\sf{Distance \: = \: 19980 \: m}} \\ \\ \underline{\sf{\therefore \: Distance \: travelled \: by \: car \: is \: 19980 \: m}}$

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And we have formula for Work done :

$\large{\boxed{\sf{W \: = \: F.s}}} \\ \\ \implies {\sf{W \: = \: 40 \: \times \: 19980}} \\ \\ \implies {\sf{W \: = \: 799200}} \\ \\ \underline{\sf{\therefore \: Work \: by \: car \: is \: 799.2 \: kJ}}$

Answer 2

$\Large{\underline{\underline{\bf{Solution :}}}}$

☯ Given :

Speed (s) = 120 $\sf{Kmh^{-1}}$ = 33.33 $\sf{ms{-1}}$

Time taken = 20 mins = 600 seconds

Force = 40 N

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☯ To Find :

We have to find the work done.

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☯ Solution :

We know that,

$\Large{\implies{\boxed{\boxed{\sf{Speed = \frac{Distance}{Time}}}}}}$

_______________[Put Values]

$\sf{→ 33.33 = \frac{Distance}{600}} \\ \\ \sf{→ Distance = 33.33 \times 600} \\ \\ \sf{→ Distance = 19998 } \\ \\ \Large{\implies{\boxed{\boxed{\sf{Distance = 199980 \: m}}}}}$

$\rule{200}{2}$

$\bf{Now,} \\ \\\Large{\implies{\boxed{\boxed{\sf{Work = Force \times Distance}}}}} \\ \\ \sf{→ Work = 40 \times 19998} \\ \\ \sf{→ Work = 799920} \\ \\ \Large{\implies{\boxed{\boxed{\sf{Work = 799920 \: J}}}}}$

$\therefore$ Work Done = 799920 J