What is log2 8 ? [watch out for the different base]

Explanation:

To calculate the value of

Also,Some relation for log values:

 -----------------------------------------------------1

---------------------------------------------------------------2

Also,

Applying in the question as:

Using Relation-1 mentioned above:

Using Relation-2 mentioned above:

Thus,

acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

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answer: a. same unit

explanation: