Question

Could you help me describe the motion below a-t graph (acceleration vs. time)?

How would you go about describing the motion of each slope? (*Assume [N] is +ve)

Answer 1

Step-wise explanation is as follows

1. An object has acceleration `a=0cms^-2` at time `t=0s`
2. We observe that its acceleration changes linearly to `-2cms^-2` in the next `1s`.
3. For next `1s`, from `t=1s " to " t=2s`, the acceleration increases linearly to `1cms^-2`.
4. From `t=2s " to " t=5s` the object moves with constant acceleration of `1cms^-2`.
5. For next `1s`, from `t=5s " to " t=6s`, the acceleration decreases linearly to `0cms^-2`
6. The object continues with `0` acceleration for next `1s`, from `t=6s " to " t=7s`,