Recent content by polly06

..thanks for the replies. I have booked into see a phyics tutor this week. I shall reply with my findings thanks again -polly

...ok, thank you for your prompt reply Doc Al. Where I am confused is: Max static friction = uR ...so how can R be calculated when the mass is unknown? ...so I deduct that it should have been R= mgsin70 ...so I now need to determine the net force acting parallel to the slope by...

My question is: If a car is moving at 33m/s^-1 down a 20 degree slope, the friction between car tires and the road surface is 0.58, what is the shortest distance and time in which it can stop? I assume that Fmax= u R is correct formula? (where Fmax=force max, u=coeff of friction, and R=...