Question

ULITU Starting from the origin a body oscillates simple harmonically with a period of 2s. After what time will its kinetic energy be 25% of the total energy?
A) 1/6 s
B) 1/4 s
C) 1/3 s
D) 1/12 s​

Answer 1

Answer:

Correct option is

A

1/6s

As per,

KE=

100

75

E=

100

75

×

2

1

ma

2

ω

2

2

1

ma

2

ω

2

cos

2

ωt=

100

75

×

2

1

ma

2

ω

2

cos

2

ωt=

4

3

cosωt=

2

3

=cos

6

π

or ωt=

6

π

⇒t=

6π

π

=

6

1

s

Explanation:

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Answer 2

Answer:

A) 1/6 s ; Please mark me as brainlist.