Question

Sexton A
Choose correct answer from the given alternatives and write it. [Each carries | Mark] [2]
ir weak nuclear force, gravitational force and electromagnetle force are respectively W, G and
E then
too > SF
DE > WG
The number of significant figures in 0.06900 Le
Sertion B
Answer the following Questions, [Each carries 1 mark)
Give Information about the law of conservation of mass.
Nor
Fut In the blanks by suitable comversion of units : G = 667 * 10-11
Draw the r-graphs which represent the positive, negative and rem velocity.
Section )
Answer the following Questions. [Each carries 2 marks]
Write a note on SI (System International)
The position of an object moving along v-axis is ghven by x(t) = (4.27.26m. then find the
velocity of partiele at t - Ox and t - 3x then find the average velocity of partide at t = 0 to
What is free fall ? Write equations of uniformly accelerated motion for object falling freely
The moon is observed from two diametrically opposite points A and B on Earth. The ange 8
subtended at the moon by the two directions of observation is 1'54. Given the diameter of
the Earth to be about 1.276 x 107 m, compute the distance of the moon from the Earth.
OR
Explain parallax method to measure distance between the earth and planet.
Write and explain rules of determining significant digit with example.
Section D
16)
Answer the following Questions. [Each carries 3 marks!
In Ohm's experiment to measure resistance different observation of unknown resistance are
4.120, 4.08 . 4.220 and 4.140. Find average absolute error, relative error and pementary
error
A car moving along a straight highway with speed of 126 kmh' is brought to a stop within a
distance of 200 m. What is the retardation of the car (assumed uniform), and how long does it
take for the car to stop ?
Section E
Answer the following Questions. [Each carries 4 marks)
Derive the equations of uniformly accelerated motion by graphical method.
OR
Obtain equations of motion for constant acceleration using method of calculas
*I am a great believer in luck, and I find the harder work, the more I have of it.​

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