When the slope of v–t graph is negative and constant, what is the nature of acceleration?
When the slope of v–t graph is negative and constant, acceleration is constant and negative, that is, the body is in a state of constant retardation.
When a body repeats its motion in regular interval of time then it's said to execute periodic motion. Let's say a car is going on a race track (as shown in figure)
The car covers 5 laps.
For each lap it took 10 mins
In which of the below mentioned cases will its motion be considered periodic.
Case I: The car was travelling with constant speed.
Case II: The car had a constant acceleration from rest (0 m/s) and then a constant deceleration to rest (0 m/s) in each lap for all 5 laps.
Case III: The car had a non-uniform acceleration throughout the journey.
Case IV: lap 1 with constant speed, lap 2 with constant acceleration, lap 3, 4, 5 with variable acceleration.
Column-I
Column-II
(a)
Velocity-time graph
(p)
Slope→negative
(b)
Acceleration-time graph
(q)
(c)
Displacement-time graph
(r)
Slope→zero