Systems of Particles and Rotational Motion — Physics STD 11 Science — Question

When the earth shrinks, without reducing its mass, what change will be there in the duration of a day?

How many dynes make a newton?

What is the amount of work done in bringing a mass from the surface of Earth on one side to a point diametrically opposite to the other side?

Why is it not necessary for a body following another to stop, to avoid collision?

A steel rod of cross-sectional area 4cm² and length 2m shrinks by 0.1cm as the temperature decreases in night. If the rod is clamped at both ends during the day hours, find the tension developed in it during night hours. Young's modulus of steel = 1.9 × 10¹¹N/m².

In a fly wheel, most of the mass is concentrated at the rim. Explain why?

Does the force of attraction between two bodies depend upon the presence of other bodies and properties of intervening medium?

Value of g is largest at the poles due to _________.

Which harmonic will generate in close organ pipe?

Draw the variation of potential energy stored in a spring as a function of extension.