You are watching: You are standing in a moving bus facing forward
At first I thought it was the pressure of friction acting opposite the direction of motion, but I to be told the answer"s D. I"m not sure exactly how you can experience a change in acceleration without there gift a force present.
but ns was told the answer"s D. I"m no sure exactly how you deserve to experience a readjust in acceleration without there being a force present.
There is no communication force accelerating you, yet in the non-inertial structure of the bus there is an inertial force that account for that acceleration:http://en.wikipedia.org/wiki/Fictitious_forceI i think the check is done at a level prior to non-inertial frames are introduced. So better stick come the inertial structure of the road: The bus increases backwards, while you just proceed to move forward, i m sorry doesn"t require any forces. That"s why friend slide loved one to the bus.
The only force on girlfriend is with your feet ~ above the floor the the bus (and her hand if you to be smart sufficient to host onto a bar). Since the bus is slowing, those are pressures are backwards. And, so, her acceleration is backwards. But you already had speed and momentum forwards. Your movement forwards, relative to the bus, is due to the fact that you space not accelerating (backwards) fairly as rapid as the bus.
At first I assumed it was the pressure of friction acting opposite the direction of motion, yet I to be told the answer"s D. I"m not sure how you deserve to experience a change in acceleration there is no there gift a force present.
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When you and the bus space heading down the roadway at 30 km/hr, how quick are friend moving? 30 km/hr, the course.When the bus decelerates to 25 km/hr since of the friction between its tires and also the road, how rapid are friend moving? quiet 30 km/hr, that course.How rapid are you approaching the front of the bus? It"s moving at 25 km/hr, you"re moving at 30 km/hr, it"s going come feel together if you"ve been thrown in the direction of the front of the bus at 5 km/hr, yet actually you"re just continuing happily (at the very least until girlfriend hit the former of the bus) in ~ the exact same speed you constantly were.The only forces acting top top you room friction (between her shoes and the floor the the bus) and if you are unlucky, influence forces as soon as you smash right into the prior of the bus. These pressures are exhilaration to sluggish you from 30 km/hr come 25 and will eventually get your rate down to the of the bus. But until they do, it will seem together if you arevaccelerating towards the prior of the bus; in fact the front of the bus is decelerating while you"re not.