Question

If a car moving with 36 km/h increases its speed to 54 km/h in 10 seconds, find (i) acceleration and (ii) distance covered by the car in this time. *

3 points
If a car moving with 36 km/h increases its speed to 54 km/h in 10 seconds, find (i) acceleration and (ii) distance covered by the car in this time. *

3 points


An object travels 16 m in seconds and then another 16 m in 3 seconds. Is his motion uniform or non-uniform? *

1 point

Choose




A car traveling at a velocity of 10 m/s due north speeds up uniformly to a velocity of 25 m/s in 3s. Calculate the acceleration during this period. *​

Answer 1

Answer:

(I) a = 0.5 m/s^2

(ii) S= 125 m

Explanation:

i) a = (v-u) /t

u= 36 km/h = 36×5/18 = 10m/s

v= 54km/h = 54×5/18 = 15m/s

a = (15-10) / 10

a = 5/10 = 0.5 m/s^2

ii) v^2 =u^2 +2as

15^2 = 10^2 +2×0.5×S

225 - 100 = S

125 m = S