Question

A car start from rest and acquire a velocity of 54 km/h in 2 sec.

Find

(i) the acceleration

(ii) distance travelled by car assume motion of car is uniform.​

Answer 1

Answer:

The solution is given in the attachment.Please follow me if possible

Answer 2

$\large{\boxed{\bf{Answer\ :-}}}$

• Acceleration = 7.5m/s²

• Distance travelled by car assume motion of car is uniform = 15m

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Given :-

• Time = 2 sec

• Initial velocity = 0 (as car is starting from rest)

• Final velocity = 54km/hr (54 is multiplied by 5/18)

➪ 5/18 × 54

➪ 5 × 3

➪ 15m/s

To Find :-

• Acceleration

• Distance travelled by car assume motion of car is uniform.

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$\large{\boxed{\bf{Solution}}}$

• u ➪ initial velocity ➪ 0

• v ➪ final velocity ➪ 15m/s

• t ➪ time ➪ 2sec

• a ➪ acceleration ➪ ?

★ Equation of motion :-

• v = u + at

➪ 15 = 0 + 2a

➪ 15 = 2a

➪ a = 15/2

➪ a = 7.5m/s²

★ Now distance travelled :-

• s = ut + 1/2at²

➪ s = 0 × 2 + 1/2 × 7.5 × (2)²

➪ s = 0 + 15

➪ s = 15m

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