A particle has an initial velocity $3 \hat { i } + 4 \hat { j }$ and an acceleration of $0.4 \hat { i } + 0.3 \hat { j }$. Its speed after 10 s is (1) 10 units (2) $7 \sqrt { 2 }$ units (3) 7 units (4) 8.5 units
A particle has an initial velocity $3 \hat { i } + 4 \hat { j }$ and an acceleration of $0.4 \hat { i } + 0.3 \hat { j }$. Its speed after 10 s is\\
(1) 10 units\\
(2) $7 \sqrt { 2 }$ units\\
(3) 7 units\\
(4) 8.5 units