c = rolling resistance coefficient - dimensionless (coefficient of rolling friction - CRF) W = m a g = normal force - or weight - of the body (N, lb f) m = mass of body (kg, lb) a g = acceleration of gravity (9.81 m/s 2, 32.174 ft/s 2) Note that the rolling resistance coefficient - c - is influenced by different variables like wheel design ...

Sa vs dsa keycapsHere’s a useful trick to avoid having to convert between pounds, newtons, and kg. Suppose you weigh 150 lb and you’re accelerating up at 8 m/s 2. N - mg = m a ⇒ N = m a + mg = m a + 150 lb. The trick is to multiply and divide m a by g and replace mg with 150 lb again: Apparent weight = N = m g a / g + mg = (150 lb) (8 m/s 2) / 9.8 m/s 2 ...

If the coefficient of static friction is 0.6 between the block and the incline, find the angle that causes the block to slide. 7. A 70 kg skier is skiing down a hill with an angle of inclination of 20o. He has. newly waxed skis, which have a coefficient of kinetic friction of 0.05 with the.