A train is 200m long and is moving with uniform velocity of 36 km/h the time it will take to cross a bridge of 1 km is
Correct answer: B. 120 sec
- A. 100 sec
- B. 120 sec
- C. 60 sec
- D. 50 sec
Explanation
Consider one point on the train as your frame of reference , so at any given point the train needs to travel 1200m ( 1km +200 m) to reach the other side of the bridge.And converting 36kmph into m/s gives us 10m/s. So by using time = displacement/velocity Time = 1200/10= 120 seconds
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Displacement, velocity and acceleration describe motion, including the horizontal and vertical components of projectile motion. The chapter connects these quantities with Newton's laws, momentum and impulse, then applies conservation of momentum to collisions, distinguishing elastic collisions from inelastic ones.
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