two trains A and B 100km apart are travelling towards each other on different tracks with starting speed of 50km/hr for both.the train a accelerates at 18km/hrsquare and train b retards at the rate of 18km/hrsquare .the distance covered by the train A when they cross each other
Answers
Distance between train A and train B = 100 Km
Right direction -----> taken positive +ve
Left direction <------- taken negative -ve
Speed of train A 50 km/hr
Speed of train B -50 km/hr
Acceleration of train A = 18 km/hr sq.
Acceleration of train B = - 18 km/hr sq.
RELATIVE MOTION
Speed(u) = 50 - (-50) = 100 km/hr
Acc = 18 - (-18) = 36 km/hr sq.
s = ut + 1/2 at sq.
100 = 100(t) +18(t sq)
9t sq + 50t -50 = 0
Distance between train A and train B = 100 Km
Right direction -----> taken positive +ve
Left direction <------- taken negative -ve
Speed of train A 50 km/hr
Speed of train B -50 km/hr
Acceleration of train A = 18 km/hr sq.
Acceleration of train B = - 18 km/hr sq.
RELATIVE MOTION
Speed(u) = 50 - (-50) = 100 km/hr
Acc = 18 - (-18) = 36 km/hr sq.
s = ut + 1/2 at sq.
100 = 100(t) +18(t sq)
9t sq + 50t -50 = 0