Question

A student uses a simple pendulum of exactly 1m length to determine g, the acceleration due ti gravity. He uses a stop watch with the least count of 1sec for this and record 40seconds for 20 oscillations for this observation, which of the following statement (s)is(are) true?

Answer 1

Answer:

Explanation:

We know that,  

T

ΔT

​  

=  

t

Δt

​  

=  

40

1

​  

 

T=2sec/ Oscillation  

ΔT=0.05sec

We have g=  

T  

2

 

4π  

2

Ln  

2

 

​  

 

g

Δg

​  

=  

T

2ΔT

​  

 

⇒ % error =  

T

2ΔT

​  

×100

We know,  

T

ΔT

​  

=  

40

1

​  

 

T

2ΔT

​  

×100=5%