1010 - Physics Questions Answers

A BODY OF MASS M FALLS FROM H HEIGHT ON GROUND. IF e IS COEFFICIENT OF RESTITUTION OF COLLISION BETWEEN BOY N GROUN THEN WHAT IS THE DISTANCE TRAVELLED BY BOY BEFORE IT COMES TO REST

a large number of identical point masses m are placed along x-axis , at x=0,1,2,3,4.....the magnitude of gravitational force on mass at origin (x=0), will be ??

 

                                                                                                            If r₀ = 20869 χ 10^-10 m and E₀ /K_B= 10.22 K for He calculate and plot the Lennard Jones potential? Set one molecule at a fixed (pinned) position on the x-axis, say at x = 5 nm.  The other molecule starts at the origin with initial velocity v₀  =v₀ (x cosβ +y sinβ) where β is small angle between v₀  and the x-axis.  Develop a computer program to calculate the trajectory of the moving particle in the x-y plane for various v₀ and β , based on (a) the rigid-elastic-sphere assumption and (b) the intermolecular force field. Comment on the differences between the results obtained from the two models?

1.)Why only mercury is used in barometers?

2.)Is pressure scalar or vector? How?

If two discs of moment of inertia a and b rotating about collinear axis passing through their centres of mass and perpendicular to their plane with angular speeds c and d respectively in opposite directions  are made to rotate combinedly along same axis, then the magnitude  of angular velocity of the system is?

If two discs of moment of inertia a and b rotating about collinear axis passing through their centres of mass and perpendicular to their plane with angular speeds c and d respectively in opposite directions  are made to rotate combinedly along same axis, then the magnitude  of angular velocity of the system is?

A uniform rod AB, 4m long and weighing 12 kg, is supported at end A, with a 6kg lead weight at B. The rod floats as shown in the figure with one-half of its length submerged. The buoyant force on the lead mass is negligible as it is of negligible volume. Find the tension in the cord and total volume of the rod.

A uniform rod AB, 4m long and weighing 12 kg, is supported at end A, with a 6kg lead weight at B. The rod floats as shown in the figure with one-half of its length submerged. The buoyant force on the lead mass is negligible as it is of negligible volume. Find the tension in the cord and total volume of the rod.