. a car acquires a velocity of 180km/h in 20sec starting from rest. fi

1.	. a car acquires a velocity of 180km/h in 20sec starting from rest. find a) acceleration b) average velocity c) the distance travelled in this time.
Answer» u = 0 m/s v = 180 km/h = 1805/18 m/s = 50 m/s t = 20 s a) a = ? As v = u + a t or, 50 = 0 + a20 a = 50/20 = 2.5 m/s^2 b) avg. velocity = ? avg. velocity = (u + v) / 2 = (0 + 50)/2 v avg. = 25 m/s c) s = ? as s = ut + 1/2 at^2 so, s = 0 + 1/2 * 2.5 * 20^2 so, s = 500 m

. a car acquires a velocity of 180km/h in 20sec starting from rest. find a) acceleration b) average velocity c) the distance travelled in this time.

Answer»

u = 0 m/s

v = 180 km/h = 180*5/18 m/s

= 50 m/s

t = 20 s

a) a = ?

As v = u + a t

or, 50 = 0 + a*20

a = 50/20 = 2.5 m/s^2

b) avg. velocity = ?

avg. velocity = (u + v) / 2

= (0 + 50)/2

v avg. = 25 m/s

c) s = ?

as s = ut + 1/2 at^2

so, s = 0 + 1/2 * 2.5 * 20^2

so, s = 500 m

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. a car acquires a velocity of 180km/h in 20sec starting from rest. find a) acceleration b) average velocity c) the distance travelled in this time.

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