1.

A car starts from rest and accelerates uniformly to a speed of `180 kmh^(-1)` in 10 s. The distance covered by the car in the time interval isA. 200 mB. 300 mC. 500 mD. 250 m

Answer» Correct Answer - D
`u=0,upsilon=180 kmh^(-1)=50 ms^(-1)`
Time taken, `t=10s, a=(upsilon-u)/(t)=(50)/(10)=5 ms^(-2)`
Distance covered by the car `s=ut+(1)/(2)at^(2)=0+(1)/(2)xx5xx(10)^(2)`
`=(500)/(2)=250m`


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