Car travels 60 km/h will skid 30 m when its brakes are locked. if the same car is traveling 180 km/h, what will be the skidding distance?

270 m

Explanation:

When the driver hits the brakes, the kinetic energy of the car is converted by friction into heat. The kinetic energy K is given by:

(1)

The work W done by friction is:

(2)

where the force of friction is:

d: distance sliding

μ: friction coefficient

m: mass

g: gravitational constant

setting equation 1 and 2 equal:

(3)

simplifying:

(4)

Use equation 4 to find the ratio between the two cases gives:

(5)

plugging in:

diagram is missing, but i will try to explain your doubt.

answer:

amplitude is the maximum displacement or distance moved on a point of a vibrating body or wave measured from its equilibrium position.it is equal to half the length of vibration path.

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