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  • a body of mass 5kg  starts from the origin with a initial velocity u=(30i+40j)m/s.if a constant force (-6i-5j)N acts on body,the time in which the y-component of yhe velocity becomes zero is</

a body of mass 5kg  starts from the origin with a initial velocity u=(30i+40j)m/s.if a constant force (-6i-5j)N acts on body,the time in which the y-component of yhe velocity becomes zero is

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best_answer

\(\vec{F}=m \vec{a} \Rightarrow \vec{a}=\frac{\vec{F}}{m}\)

\(\frac{-6 \hat{i}-5 \hat{j}}{5}\)

\(=-1.2 \hat{i}-1 \hat{j} m / s ^2\)

\(v_y=\omega_y+\omega_y t\)

\(0=40-1 \cdot t \Rightarrow t=40\) seconds

Posted by

Divya Sharma

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