hernandezeileen20
05.09.2019 •
Physics
Ann is driving down a street at 63 km/h. suddenly a child runs into the street. if it takes ann 0.796 s to react and apply the brakes, how far will she have moved before she begins to slow down? answer in units of m.
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Ответ:
13.93 m
Explanation:
initial velocity, u = 63 km/h
Convert km/h into m/s
so, u = 63 km/h = 17.5 m/s
reaction time, t = 0.796 s
Distance traveled by Ann before slowing down = speed of Ann x reaction time
= 17.5 x 0.796
= 13.93 m
Thus, the distance traveled by Ann before slowing down is 13.93 m.
Ответ:
Explanation:
Joule's law of heating states that, when a current 'i ' passes through a conductor of resistance 'r' for time 't' then the heat developed in the conductor is equal to the product of the square of the current, the resistance and time.