A particle moves from the point (2.0 i +4.0 j ) m , at t =0 , with an initial velocity (5.0 i +4.0 j ) ms ⁻¹ . It is acted upon by a constant force which produces a constant acceleration (4.0 i +4.0 j ) ms ⁻² . What is the distance of the p

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A particle moves from the point (2.0 i +4.0 j ) m , at t =0 , with an initial velocity (5.0 i +4.0 j ) ms ⁻¹ . It is acted upon by a constant force which produces a constant acceleration (4.0 i +4.0 j ) ms ⁻² . What is the distance of the particle from the origin at time 2 ~s ?

Quantrex Academy · Accepted Answer

Correct answer: B. 20 2 ~m

As S = ut + 1 2 a t ² S =(5 i +4 j ) 2+ 1 2 (4 i +4 j ) 4=10 i +8 j +8 i +8 j r _ f - r _ i =18 i +16 j [ as s = . change in position .= r _ f - r _ i ] r _ r =20 i +20 j | r _ r |=20 2

A particle moves from the point (2.0 i +4.0 j ) m , at t =0 , with an initial velocity (5.0 i +4.0 j ) ms ⁻¹ . It is acted upon by a constant force which produces a constant acceleration (4.0 i +4.0 j ) ms ⁻² . What is the distance of the particle from the origin at time 2 ~s ?

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