Question

A ball is thrown with a velocity 6$\widehat{j}$ with an acceleration $6\widehat{i} + 2\widehat{j}$. The velocity of the ball after 5 seconds is

• A. $30\widehat{i} + 10\widehat{j}$
• B. $30\widehat{i} + 16\widehat{j}$
• C. $10\widehat{i} + 24\widehat{j}$
• D. None of these

Answer 1

Answer: (B)

$30\widehat{i} + 16\widehat{j}$

Answer 2

using v = u + at v_x = 6(5) = 30 ms^-1

v_y = 6 + 2(5) = 16 ms^-1 v = $30\widehat{i} + 16\widehat{j}$