Question

Find the initial velocity of a car which is stopped in 10s applying brakes. retardation due to brakes in 250m/s2
options are :
25m/s
2.5 m/s
250 cm/s
25 cm/s

Answer 1

t=10s a=-250m/s^2 v=0
v=u+at
0=u-250×10
u=2500 m/sec Ans

plz recheck the question and options