Physics Answers

A snooker ball X of mass 0.3kg moving with a velocity 5m/s hit a stationary ball of mass 0.4kg.Y moves off with a velocity of 2m/s at 30degree to the initial direction of X.Find the velocity v of X and its direction after hitting Y.

A "moving sidewalk" in an airport terminal building moves at 1.0 m/s and is 35.0 m long. If a woman steps on at one end and walks at 1.5 m/s relative to the moving sidewalk, how much time does she require to reach the opposite and if she walks (a) in the same direction the sidewalk is moving? (b) In the opposite direction?

Metalic rod of 30cm of initial temperature of 42 degree celsius extended to 30.2Cm when subjected to 82 degree celsius calculate linear expansivity of the metalic material .If the material were to be used to construct an cuboid box. What is the cubic expansivity of the box.

A motorist undergoes a displacement of 250km in direction 60°.Calculate the component of the displacement in the northern direction.

Two long parallel wire are 10cm carrying a current of 6A and 4A. Calculate the force of acting on a 100cm length of

a sheet of polythene(er=1.3) and 0.5mm thickis to be used in capacitor by sandwiching it two sheet of aluminum foil.what area must sheets have

A spinning wheel has a moment of inertia of 2.50kg.m^2 about its axis of rotation starting from rest,how much constant torque is required to bring it to an regular speed of 300 rpm in 10.0s?.

A figure skater begins spinning counterclockwise at an angular speed of 4.3 π rad/s. During a 5.0 s interval, she slowly pulls her arms inward and finally spins at 7.7 π rad/s. What is her average angular acceleration during this time interval? Answer in units of rad/s 2 .

A block rest on a horizontal board. the board is gradually tilted upward and the block just

begin to slide when the angle of inclination is 21°,

a. Find the coefficient of static friction between the block and the board

Starting with the definition 1in.=2.54cm

1in.=2.54cm, find the number of kilometers in 1.40 mi