00:01
We know that acceleration is the rate of change of velocity.
00:09
It is given by expression a equals v by t where v is the change in velocity and t is the change in time.
00:19
Now in option a, the given statement is that a rate of change of velocity.
00:29
So this is given by the expression a equals v by t.
00:34
And we know that this is true about acceleration.
00:37
Hence, this is a true statement.
00:40
Now, in the case of option c, the statement given is that the rate of change of speed in particular direction.
00:51
So we know that velocity, velocity is a vector quantity.
01:00
Velocity is a vector quantity because it includes direction.
01:04
It includes direction, hence it is a vector quantity.
01:08
Now in the case of speed which only includes the magnitude of the speed or magnitude of the velocity.
01:19
So it is a scalar quantity.
01:21
Now in both cases it is still measuring the speed of the motion of the particle or object.
01:29
Hence we can say that option c is also right.
01:32
That is a.
01:34
Here the expression is given by a equals speed by time.
01:38
Rate of change of speed in particular motion, in particular motion...