PHYSICS (XI) – To be submitted on 12th Bhadra

•          PHYSICS (XI) – To be submitted on 12th Bhadra
1) A simple pendulum has length 1m. The amplitude of the pendulum is 1cm.Find velocity at lowest point and acceleration at highest point.
2) What is second pendulum?
3) A simple pendulum has period 4.2 sec. When it's length is shortened by 1m, the period is 3.7 sec. Find length and value of g.
4) What force is required to stretch a steel wire of cross-sectional area 1square cm to double it’s length?
5) Is a physical quantity having magnitude and direction necessarily a vector quantity? Explain.
6) State and explain the triangle law of vector addition. Find magnitude and direction of resultant.
7) Does coefficient of linear expansion depend upon original length?
8) Describe a method to find coefficient of linear expansion.