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A car moving along a straight road with ...

A car moving along a straight road with a speed of 72 km ` h^(-1)` , is brought to rest within 3 s after the application of brakes. Calculate the deceleration produced by the brakes.

Text Solution

Verified by Experts

Initial velocity .u. = `72kmh^(-1)=72xx5/18=20ms^(-1)`
Final velocity, `v=0ms^(-1)`
Time, t = 3s
`(v-u)/t=a`,
`(0-20)/3=arArr"deceleration"=-6.67ms^(-2)`
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