Question

The roadway bridge over a canal is in the form of an arc

of a circle of radius 20 m. What is the minimum speed

with which a car can cross the bridge without leaving

contact with the ground at the highest point (g = 9.8

m/s2

)

(a) 7 m/s (b) 14 m/s

(c) 289 m/s (d) 5 m/s

Answer 1

Hey dear,
You should ask the max speed cause min speed is anything more than zero.

◆ Answer-
b) 14 m/s

● Explanation-
# Given-
r = 20 m
g = 9.8 m/s^2

# Solution-
For maximum velocity, weight of the car balances the cetrifugal force acting on it.
W = F
mg = m(vmax)^2 / r
vmax = √(rg)
vmax = √(20×9.8)
vmax = √(196)
vmax = 14 m/s

Maximum velocity without going off track is 14 m/s.

Hope that is useful...

Answer 2

Answer:

I hope this is the correct answer ☺️