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Verify Newtons second law.

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Introduction

Verification of Newton’s 2nd law

2008

AIM

To verify Newton’s second law and to determine the friction force acting on the wooden block.

BACKGROUND THEORY

When a wooden block (cart) slides over a surface, the net force acting on the block is given by,

image00.png

In the following set up, the applied is given by,

image01.png

(‘m’ is the mass suspended)

image05.png

The net force provides acceleration ‘a’ to the wooden block. Hence,

image06.png

(‘M’ is the mass of the wooden block)

APPARATUS :

Vernier lab pro , photo gates ,  wooden block , string meter scale , standard weights , pulley,  

laser source.

RAW DATA :

Least count of Vernier Lab Pro : 0.000001 s

Uncertainty of Vernier Lab Pro : ± 0.000001 s

Least count of meter scale : 0.

...read more.

Middle

1.625008

1.632085

5

0.30

1.90

49.5

1.356000

1.364286

1.539210

1.545795

DATA PROCESSING

Sr. No.

Time taken for wooden block to pass GATE 1

( ± 0.000002 s)

( T1 – t1 )

Time take for wooden block to pass  GATE 2

( ± 0.000002 s)

( T2 – t2 )

1

0.016073

0.012537

2

0.011501

0.008900

3

0.009992

0.007979

4

0.008806

0.007077

5

0.008286

0.006585

Sr. No.

Speed of the wooden block at  GATE 1

(Cm/s)

Speed of the wooden block at

GATE 2

( Cm/s )

1

118.210664 ± 3.110807

151.551407 ± 3.988195

2

165.203026 ± 4.347448

213.483146 ± 5.617978

3

190.152122 ± 5.004003

238.125078 ± 6.266449

4

215.761980 ± 5.677947

268.475342 ± 7.065140

5

229 ± 6

288.534548 ± 7.593014

Sr. No.

Acceleration

( Cm/s2)

1

92.584885 ± 7.099002

2

187.714307 ± 9.965426

3

199.646908 ± 11.270452

4

259.799714 ± 12.743087

5

312.183361 ± 13.639382

CONCLUSION & EVALUATION

...read more.

Conclusion

The atmosphere also played a major role for the errors because it provided many obstacles for the experiment to happen smoothly.There is a possibility to have some friction in the pulley.

SUGGESTION TO IMPROVE

  • The errors could have been prevented by using a good quality of lab bench.
  • The quality and the cutting of the wood should be accurate so that the laser beam is cut at a proper place.
  • If the experiment was done in vacuum, then it could have 0 % error.
  • The pulley should be greased before the experiment so that there is least possible error by the pulley.

Candidate Name :

Candidate Session Number :        Page

...read more.

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