A boy weighing 60 kgf stands on platform of dimensions 2.5×0.5cm. What pressure in Pascal does he exert?
A massive platform of mass M is moving horizontally with speed v = 6 ms−1. At t = 0 a body of mass m (m << M) is gently placed on the platform. If coefficient of friction between body and platform is μ = 0.3 and g = 10 m/s2, then