Question

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Answer 1

Explanation:

given :

The distance covered by 0/1 the object in 10s is

to find:

distance covered

.

solution :

speed in m/s = 10/1 = 50 /10

= 5m/s

speed in km / hr = 5× 5/ 18 = 25/8

hence, 25/8 is the answer

Answer 2

Explanation:

Velocity at t = 0, u = 0 Velocity at t = 2 sec, v = 20 m/s So, from v = u + at we get a = 10 m/s2 So distance covered between 0 to 2 sec s = ut + 1/2 at2 = 0 × 2 + 1 2 × 10 ( 2 ) 2 =0×2+12×10(2)2 = 20 m From 2 sec to 5 sec, velocity is same 20 m/s, so distance travelled = 20 x 3 = 60 m ∴ ∴ Total distance covered between 0 to 5 sec = 20 + 60 = 80 m