A body mass 6kg is acted upon by a cons-an t force f-2i-3j-N- If its initial velocity at t-0 is v- -3i-4j-m-s- then the time at which its velocity will be along the x axis is -1-10s -2-6s -3-8s -4-never

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Third Law of Motion

A body mass 6...

Question

A body mass 6kg is acted upon by a cons†an t force \overrightarrow f=(2i-3j)N. If its initial velocity at t=0 is \overrightarrow v= (-3i+4j)m/s, then the time at which its velocity will be along the x axis is (1)10s (2)6s (3)8s (4)never

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\to F = (- 3^i + 4^j) N

t = 0

\to u = (6^i - 12^j) m s^{- 1}

^i

^j

^i

^j

s^{- 1}

5 k g

\to F = F_{X}^i + F_{Y}^j

t = 0

\to v = (6^i - 2^j) m / s

t = 10 s

\to v = + 6^j m / s

\to F

2 k g

3 m / s

x -

1.25 N

y -

4

t = 0

\to F = F_{x} ˆ i + F_{y} ˆ j

t = 0

\to v = (6 ˆ i - 2 ˆ j) m / s

t = 10

\to v = 6 ˆ j m / s

\to F

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