Question

PLEASE HELP! 2ND TIME I ASKED THIS!!!

Emma is riding on a train. The train is moving at 50 m/s. Emma walks down the aisle at 1 m/s relative to the train in the same direction the train is moving. what is her relative velocity? Also, I know the equation for relative velocity is "t = Δx ÷ v" but how would that fit into this type of equation?? Please show you're work!

Answer 1

The train is moving at 50 m/s and Emma is walking down the aisle with 1 m/s speed in the same direction of train. The relative velocity of Emma with respect to other passengers pf the train would be 1 m/s. This is because, the train is not moving relative to them and only emma is moving at 1 m/s. If a person observes from outside, Emma would have (50 +1) m/s = 51 m/s velocity.

relative velocity when two objects are moving in same direction as oberved from outside observer:

`v_(ab)=v_a+v_b`

relative velocity when two objects are moving in the opposite directionas oberved from outside observer:

`v_(ab)=v_a-v_b`