Question

6. A car starts and attains a speed of 20 m/s in 10 seconds. Calculate (a) the acceleration. (b) the distance covered by the car in that time.​

Answer 1

Answer:

acceleration = v/t 20/10=2 m/s2

Explanation:

distance covered by that time=S=

$u + \frac{a(2n - 1)}{2| }$

here n is 10 sec

then s=20+19=39

Answer 2

Answer:

acceleration = 2m/s², distance = 100 metres

Explanation:

u = 0m/s (at rest)

v= 20m/s

acceleration (a) = v-u/t

= 20-0/10

a= 2m/s²

Now , according to second equation of motion

s=ut+1/2at²

where s is distance

s= 0*10+1/2*2*10*10

s= 100 metres