Question

A body moves with constant speed 'v' along the circumference of a circle of radius 'r'. If it completes half of the revolution in 't's, then the magnitude of the average acceleration is
a. 0
b. 2v/t
c. v/t
d. all of the above​

Answer 1

Explanation:

avg

=avg.accl

n

=

t

2

−t

1

v

2

−

v

1

Initial velocity, v

A

=v

i

^

Final velocity,

v

B

=−v

i

^

a

avg

=

t

−v−(v)

=

t

−2v

or

t

2v

Answer 2

Answer:

answerCorrect option is

B

t

2v

a

avg

=avg.accl

n

=

t

2

−t

1

v

2

−

v

1

Initial velocity, v

A

=v

i

^

Final velocity,

v

B

=−v

i

^

a

avg

=

t

−v−(v)

=

t

−2v

or

t

2v