When the slope of v–t graph is negative and constant, what is the nature of acceleration?

Q.

When the slope of v–t graph is negative and constant, what is the nature of acceleration?

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Q. When the slope of a v–t graph is negative and constant, Nature of acceleration is Uniformly retarding.

Q. Is the acceleration of a particle in uniform circular motion constant or variable?

Q.

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.

Q. Velocity of a particle is in negative direction with constant acceleration in positive direction. Then, match the following columns.

Column-I	Column-II
(a)	Velocity-time graph	(p)	Slope$\to$negative
(b)	Acceleration-time graph	(q)	Slope$\to$positive
(c)	Displacement-time graph	(r)	Slope$\to$zero
		(s)	$\left|Slope\right|\to$increasing
		(t)	$\left|Slope\right|\to$ decreasing
		(u)	$\left|Slope\right|\to$ constant