A car of mass 1380 kg, travelling at 31.1 m s^-1, is brought to rest by the brakes in 48.2 m. Calculate
(i) the initial kinetic energy of the car
(ii) average deceleration of a car
(iii) the average braking force
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Ответ:
If Grant starts at one end of the pool and swims 3 3/4 lap...
The distance travelled will the length of one lap *3.75 and the distance is nothing but the total amount of length of the pool he has covered.
Displacement is the movement from one point to the other and so in this case the useful distance that has been covered 1/4th lap.
Explanation: