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PhysicsQ&A LibraryA racing car starts from rest and reaches a final speed v in atime t. If the acceleration of the car is constant during thistime, which of the following statements must be true? (a) Thecar travels a distance vt. (b) The average speed of the car isv/2. (c) The acceleration of the car is v/t. (d) The velocity ofthe car remains constant. (e) None of these.Question

Asked Dec 16, 2019

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A racing car starts from rest and reaches a final speed v in a

time t. If the acceleration of the car is constant during this

time, which of the following statements must be true? (a) The

car travels a distance vt. (b) The average speed of the car is

v/2. (c) The acceleration of the car is v/t. (d) The velocity of

the car remains constant. (e) None of these.

Step 1

a)

The car travelled distance is equal to the average speed times of time that is v_{avg}t but not equal to vt

Therefore, given statement is **false.**

Step 2

b)

The average speed of the car is,

Step 3

Therefore the average speed of the car is v/2

Therefore ...

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