What element is named for the inventor of dynamite?
1 answer:
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Answer:
time at which Kathy overtakes Stan is 6.70 sec
Explanation:
given data
time = 1 sec
acceleration= 3.4 m/s²
acceleration = 4.49 m/s²
to find out
the time at which Kathy overtakes Stan
solution
we consider here travel time for kathy = t1
and travel time for stan is = t2
and we know initial velocity = 0
so
t1 = 1 + t2
and distance travel equation by kinematic is
d1 = ut + at²
d1 = 0+ 4.49 (t2)² ................1
and
d2 = 0 + 3.4 (1+t2)² ..................2
and when overtake distance same so from equation 1 and 2
4.49 (t2)² =
3.4 (1+t2)²
t2 = 6.703828 sec
so time at which Kathy overtakes Stan is 6.70 sec