Two cars A and B are moving in same direction
with velocities 30 m/s and 20 m/s. When car A
is at a distance d behind the car B, the driver of
the car A applies brakes producing uniform
retardation of 2 m/s2. There will be no collision
when :-
(1) d < 2.5 m
(2) d > 125 m
(3) d > 25 m
(4) d < 125 m
Answers
Answered by
4
Explanation:
Distance required to catch the speed of car B with given retardation can be found using
v^2=u^2+2as
20^2=30^2+2(-2)s
4s=30^2-20^2
$$\Rightarrow s= 125m $$
So the distance sholud be greater than 125 m
⇒d>125m
Therefore, A is correct option
Answer B
Answered by
1
Answer:
Distance required to catch the speed of car B with given retardation can be found using
v
2
=u
2
+2as
⇒20
2
=30
2
+2(−2)s
⇒4s=30
2
−20
2
$$\Rightarrow s= 125m $$
So the distance sholud be greater than 125 m
⇒d>125m
Similar questions
Social Sciences,
3 months ago
Physics,
3 months ago
Math,
3 months ago
English,
7 months ago
Math,
7 months ago
Social Sciences,
11 months ago
CBSE BOARD X,
11 months ago
Geography,
11 months ago