Question

can someone please answer this question from 11th class 1D motion
Question is attached as pic
Please help me​

Answer 1

Answer:

≈12 sec

Explanation:

speed = 35m/s

in Newton's third equation of motion.

substitute

v = 0 (final velocity/speed)

u = 35 (initial speed)

s = 200

we get,

a= - (49/16) { - sign represent's retardation of car}

substitute v, u, a in first equation of motion

we get,

t = 12.4 sec