Monthly Archive: August 2011

Aug 31

Resultant magnetic force

What is resultant magnetic force? can you please explain with an example. (Shreya) Answer: When a magnetic substance (or a magnet) is placed in a region where there are multiple magnetic fields, the net force due to all of them is called the resultant. In other words, it is that magnetic force which can effectively [...]

Permanent link to this article: http://www.plustwophysics.com/resultant-magnetic-force/

Aug 31

A problem from Projectile motion

If maximum height attained by a body projected vertically upward is equal to two times magnitude of acceleration , then its time of flight is ………. ? (Divya posted) Answer: If you take g=10 m/s2 then H=20m At max height, v=0 H=vt- 0....

Permanent link to this article: http://www.plustwophysics.com/a-problem-from-projectile-motion/

Aug 31

Question from Relative velocity

The distance between two cars decrease by 20m in 2s when they travel in opposite direction , and distance decrease by 1m in 1s when they travel in same direction. the speeds of cars are ………. ? (Divya posted this question)

Permanent link to this article: http://www.plustwophysics.com/question-from-relative-velocity/

Aug 31

A question from velocity time graph

if graph of velocity v and time t for a particle moving along straight line is parabola symmetric about time axis, then the relation between acceleration a and time t for particle is …. ? (Divya posted this question)

Permanent link to this article: http://www.plustwophysics.com/a-question-from-velocity-time-graph/

Aug 31

Coulombian force and conductor

what’s effect of  coulombic forces on conductor medium ? amk niazi Ans: In a conductor, the coulombian  repulsive forces  pushes the valence electrons and the electrons move away from the center to the surface ie from the region of stronger force to the region of lesser force, creating a Faraday cage   Incoming search terms:what’s effect of coulombic forces on conductor [...]

Permanent link to this article: http://www.plustwophysics.com/coulombian-force-and-conductor/

Aug 30

The question of minimum time and minimum distance in crossing a river.

A man crosses a river in a boat if he crosses the river in minimum time he take 10min with a drift 120metre if he crosses the river taking shortest path he takes 12.5min find the width of the river Incoming search terms:crossing a river in shortest distance and timecrossing the river in minimum timephysics [...]

Permanent link to this article: http://www.plustwophysics.com/the-question-of-minimum-time-and-minimum-distance-in-crossing-a-river/

Aug 30

Magnetism and Laws of motion

“Can a body at rest make another body move,according to the laws of Newton this is impossible. The question is in magnetism, If it happens then why is it not predicted by classical mechanics?” (Priyoranajn asked) Answer: First of all I congratulate you for your genuine thought. It is the critical thinking which will lead [...]

Permanent link to this article: http://www.plustwophysics.com/magnetism-and-laws-of-motion-2/

Older posts «

%d bloggers like this: