posted by kathy on .
What is the horizontal velocity of the pencil? the ? is you are standing in the aisle of a bus that travels along a straight road at 100km/h, and you hold a pencil still above your head. then relative to the bus,the velocity of the pencil is km/h and relative to the road,the pencil has a horizontal velocity of one the following. which is it. less than 100km/h 100km/h or more than 100km/h ? please explain
relative to the bus, it is not moving.
Relative to the ground, it is the same as the bus.
VeloPencilrelativetoground=Vbusrelative to ground + Vpencilrelativeto bus