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    				| 1. | A car of mass 800 kg moves on a circular track of radius 40 m. If the coefficient offriction is 0.5, then maximum velocity with which the car can move is(a) 7 m/s(b) 14 m's(c) 8 m's(d) 12m's | 
| Answer» Given, m = 800 kgr = 40 mμ = 0.5 Maximum velocity with which car can move without falling is vmax = √(μrg)vmax = √(0.5 × 40 × 9.8)vmax = 14 m/s Therefore, maximum velocity with which car can move without falling is 14 m/s. (b) is correct option option b is correct answer | |