-27 <\/sup>kg.<\/p>\nQuestion 2.
\nState the law of triangle of addition of two vectors.
\nAnswer:
\nIf two vectors \\(\\overrightarrow{\\mathrm{A}}\\) and \\(\\overrightarrow{\\mathrm{B}}\\) acting at a point are represented by the two sides of a triangle taken in an order then the closing side of the triangle represented in opposite order with respect to the other vectors, gives their resultant vector.<\/p>\n
Question 3.
\nState Aristotle’s fallacy.
\nAnswer:
\nAristotle assumed that force is required in order to set bodies in motion. However if a body is already in an uniform motion along a straight line, no external forces are required.<\/p>\n
Question 4.
\nName the type of energy stored in a stretched or compressed spring.
\nAnswer:
\nPotential Energy.<\/p>\n
<\/p>\n
Question 5.
\nGive an example for torque or moment of couple.
\nAnswer:
\nWhen two equal and opposite forces are applied at the two ends of the lid of the bottle, the lid experience the torque or rotational effect.<\/p>\n
Question 6.
\nWrite the aim of Cavendish experiment in gravitation.
\nAnswer:
\nCavendish experiment determines the gravitational force of attraction between two ‘1 kg’ mass separated by ‘1 m’ apart.<\/p>\n
Question 7.
\nHow does strain depend on stress?
\nAnswer:
\nStrain is directly proportional to stress.
\nStrain \u221d Stress.<\/p>\n
Question 8.
\nMention the value of steam point of water in Fahrenheit scale.
\nAnswer:
\nSteam point = 100\u00b0C = 212 \u00b0F.<\/p>\n
Question 9.
\nWhich quantity is kept constant in adiabatic process?
\nAnswer:
\nIn an adiabatic process, entropy oft he system will remain constant.<\/p>\n
<\/p>\n
Question 10.
\nThe function y = log (\u03c9t). The displacement y increases monotonically with time t, is it periodic function or non-periodic function.
\nAnswer:
\nNon-periodic function.<\/p>\n
Part – B<\/span><\/p>\nII. Answer any FIVE of the following questions: ( 5 \u00d7 2 = 10 )<\/span><\/p>\nQuestion 11.
\nName any two fundamental forces in nature.
\nAnswer:<\/p>\n
\n- Gravitational force<\/li>\n
- Electro – weak force<\/li>\n
- Strong nuclear force<\/li>\n<\/ol>\n
Question 12.
\nDefine accuracy in the measurement. How does accuracy depend on precision in the measurement.
\nAnswer:
\nAccuracy refers to finding of the result very close to expected result whereas precision is limited to the error in the instrument.<\/p>\n
<\/p>\n
Question 13.
\nDistinguish between speed and velocity.
\nAnswer:
\nAverage Speed:<\/p>\n
\n- The ratio of total distance traveled to the total time gives the average speed.<\/li>\n
- Average speed is a scalar physical quantity.<\/li>\n
- Average speed of a particle is finite; cannot be zero and always positive.<\/li>\n
- Average speed is greater than the magnitude of average velocity.<\/li>\n<\/ul>\n
Average Velocity:<\/p>\n