Question

A vehicle moving with speed 30 km/h on a straight
road can be stopped in 6 m distance by applying
brakes. If same vehicle is moving with 60 km/h and
brakes provide double retardation then vehicle will
stop after travelling​

Answer 1

Answer:

12m

Explanation:

Given

u1 = 30km/h = 8.3 m/s

s1 = 6m

v1 = 0

v2 = 60 km/h = 16.6 m/s

a2 = 2a1

To Find:

s2

Solution

v² - u² = 2as

0²- (8.3)² = 2(-a) 6

69 = 12a

a = 5.75 m/s²

now

u = 16.6 m/s

v² - u² = 2as

0 - (16.6)² = 2(-2a)s

275.6 = 4(5.75)s

275.6 = 23s

s ≈ 12m

Answer 2

Answer:

Answer=12m

Explanation:

the answer is 12 m.

Hope it helps!!!