Question

an object has an initial velocity of 5ms¯¹ and a constant acceleration of 2ms¯².how far will it have travelled when it have travelled when it attains a speed of 15ms¯¹?

Answer 1

u = 5 m/s
a = 2 m/s^2
v = 15 m/s
s (distance) = ?
${v}^{2} + {u}^{2} = \: 2as$
${15}^{2} + {5}^{2} = \: 2 \times 2 \times s$
=> 225 + 25 = 4s
=> 250 = 4s
=> 4s = 250
=> s = 250/4
=> s (distance) = 62.5 metre