A car is moving with a constant acceleration of \( 4 \mathrm{~ms}^{-2} \). On seeing a person in... VIDEO
A car is moving with a constant acceleration of \( 4 \mathrm{~ms}^{-2} \). On seeing a person infront of it, the driver suddenly applies brake. If the car is moving with a velocity of \( 20 \mathrm{~ms}^{-1} \) at the moment when driver sees the person and the reaction time of the driver is \( 2 \mathrm{~s} \), then the distance it travels after the moment he sees the person and just before applying the brake is
(a) \( 48 \mathrm{~m} \)
(b) \( 40 \mathrm{~m} \)
(c) \( 8 \mathrm{~m} \)
(d) \( 45 \mathrm{~m} \)
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