Question

The coefficient of friction between the rubber tyres and the
road way is 0.25. The maximum speed with which a car can
be driven round a curve of radius 20 m without skidding is
(g = 9.8 m/s²)
(a) 5 m/s (b) 7 m/s
(c) 10 m/s (d) 14 m/s

Answer 1

Answer:

(b) 7m/sec

Explanation:

• v^2=ugr

here v=velocity of car

u=coefficient of friction

g= gravity(9.8N)

r=radius of curve road

• v^2=(0.25×9.8×20)m/sec
• v=√49m/sec
• v=7m/sec