Lúc 8 giờ, một ô tô khởi hành từ trung tâm A cầu giấy Hà Nội đến Bắc Giang với v1=46km/h để làm từ thiện. Cùng lúc đó, xe khách đi từ Bắc Kạn đến Hà Nội với v2=44km/h biết khoảng cách từ Hà Nội đến Bắc Giang là 180km. Hai xe gặp nhau lúc mấy giờ?

conduction, convection, radiation

  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.