an electron moving with the velocity of 5 into 10 to the power of 4 meter per second square in the direction of its initial motion and
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(1) u (initial velocity) = 5 × 10⁴ m/s v (final velocity) = 10⁵ m/s
a (acceleration) = 10⁴ m/s² t (time) = t (unknown)
v = u + at
100000 = 50000 + 10000×t
100000 - 50000 = 10000×t
50000 = 10000×t
t = 50000 / 10000 = 5 s
(2) s (distance) = (u + v) t / 2
= 5 (50000 + 100000) / 2
= 5×150000 / 2
= 750000 / 2
= 375000 m
= 3.75 × 10⁵ m OR 375 km
a (acceleration) = 10⁴ m/s² t (time) = t (unknown)
v = u + at
100000 = 50000 + 10000×t
100000 - 50000 = 10000×t
50000 = 10000×t
t = 50000 / 10000 = 5 s
(2) s (distance) = (u + v) t / 2
= 5 (50000 + 100000) / 2
= 5×150000 / 2
= 750000 / 2
= 375000 m
= 3.75 × 10⁵ m OR 375 km
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