- Gradient of the graph is equal to velocity
- Gradient = 0 , velocity = 0.
- Gradient is negative and constant, hence velocity is uniform and in opposite direction.
- Gradient is increasing, hence velocity is increasing.
Velocity-Time Graph:
- The gradient of the velocity-time graph gives acceleration.
- Gradient = 0, hence velocity is constant but acceleration = 0.
- The area below the velocity-time graph gives a value of the object's displacement.
Click on the diagram below to play!
Cikgu Wong, can you help me to solve this question.
ReplyDeleteIn emergency stop, a driver applies the breaks in a car travelling at 24 ms-1. The car stops after travelling 19.2m while braking. Calculate the average acceleration of the car during braking?
Initial velocity, u = 24
ReplyDeleteFinal velocity, v = 0
Total distance, s = 19.2
Use V2= U2 + 2as formula
0 = 576 + 2a(19.2)
a = -576/19.2 = 30 ms-2
Thank you cikgu wong
ReplyDeleteim always confuse when i want to use the formula..which formula shouls i use .can you help me and teach me how to use formula based on the question
ReplyDeletecikgu wong , why don't you just use this formula , v-u/t , for the first question in the comments ?
ReplyDeleteManisha, it is because, there is no time required in the question. so you cannot use the formula v-u/t.
ReplyDelete