Question

an electron is moving with a speed of 80 km/hr it starts reatrding uniformly at 1 m/s² and comes to rest find the distance traveled​

Answer 1

Answer:

1481.48 meters

Explanation:

first convert speed to meters

$80 \times \frac{5}{18} = \frac{400}{18} = \frac{200}{9}$

now, find the time taken for coming at rest

u - v / a = (-200/9)/(-1) = 200/9 seconds

now find the answer by second equation of motion

ut + at²/2 = (400/9)(400/9) + {-1(400/9)²/2} = 160000/81 - 40000/81 = 120000/81 = 40000/27 = 1481.48 meters