Recent content by wai1997401

but the angle x is a θ less then 90 degrees but bigger than 0 degree...the force applied is never 0

Homework Statement When the charge enters the magnetic feld at an angle x , how the radius can be expressed as? Homework Equations Force of charge in a magentic field = qvbsinx centripetal force = mv^2/r The Attempt at a Solution when i combined the two equations above, i got...

i have one question to ask : if the car moves to the right,the wheels rotate clockwisely, so the friction action the wheels is on the right?

sorry for the poor description haha.i know that the change in normal reaction has something to do with friction, and the moment produced by friction about the center of gravity, but i really can't get why the R2 will increase.

Homework Statement When the car is at rest, normal reaction 1 and 2 act on the car's front wheel and rear wheel respectively . The problem is when the car starts to accelerates by rotating the wheels ,how would the normal reaction force change? Homework Equations The Attempt at a...