Question

jo answer aata a den

Answer 1

Answer:

ye hai answer eqn of motion se try karo ho jaiga

Answer 2

✯✯ QUESTION ✯✯

1. A bus starting from rest moves with a uniform acceleration of 0.1 ${ms}^{-2}$ for two minutes.Find (a)the speed acquired (b) the distance travelled.

2. A train is travelling at a speed of 90 km per hour brakes are applied so as to produce a uniform acceleration of -0.5${ms}^{-2}$. Find how far the train will go before it brought to rest.

3. A trolley while going an inclined plane,has an acceleration of 2cm/${s}^{-2}$.What will be its velovity 3s after the start?.

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✰✰ ANSWER ✰✰

1.$⇝Given\:u = 0$

$⇝a=0.1{ms}^{2}$

$⇝t=2\:minutes =120\:sec.$

We know that : -

$⇝v=u+at$

$⇝v=0+0.1×120$

$⇝v=\dfrac{0.1×120}{10}$

$⇝v=12m/s$

$⇝s=ut+\dfrac{1}{2}{at}^{2}$

$⇝s=0×120+\dfrac{1}{2}×0.1×{(120)}^{2}$

$⇝s=\dfrac{120×120}{2×10}$

$⇝s=120×6$

☛$\small{\boxed{\bold{\bold{\blue{\sf{s=720m}}}}}}$

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2.$Given u=90kmh$

$⇝\dfrac{90×5}{18}$

$⇝25m/s$

As we know: -

$⇝{v}^{2}-{u}^{2}=2as$

$⇝s=\dfrac{v^{2}-u^2}{2a}$

$⇝s=\dfrac{0-(25)^2}{2×(-0.5)}$

$⇝s=\dfrac{625}{1}$

☛$\small{\boxed{\bold{\bold{\red{\sf{s=625m}}}}}}$

_______________________

3.$⇝Given a=2cm/[tex]{s}^{-2}$

$⇝v=0$

$⇝t=3s$

We know that : -

$⇝v=u+at$

$⇝v=0+2×3$

☛$\large{\boxed{\bold{\bold{\orange{\sf{v=6cm/s}}}}}}$

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Here : -

$\small{\boxed{\underline{\bold{\pink{\sf{u=Initial\:Velocity}}}}}}$

$\small{\boxed{\underline{\bold{\green{\sf{v=Final\:Velocity}}}}}}$

$\small{\boxed{\underline{\bold{\purple{\sf{a=acceleration}}}}}}$