ch04-p111 - 111. Since the x and y components of the...

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(b) Adapting Eq. 2-11, the velocity of the particle is given by G G G vv a t =+ 0 . Thus, at t = 3.8 s, the velocity is () 22 ˆˆ ˆ ˆ ˆ (8.0 m/s) j (4.0 m/s )i (2.0 m/s ) j 3.8 s (15.2 m/s)i (15.6 m/s) j v + = + G which has a magnitude of 2 2 (15.2 m/s) (15.6 m/s) 22 m/s. xy vv v = + = 111. Since the x and y components of the acceleration are constants, we can use Table 2-1 for the motion along both axes. This can be handled individually (for Δ x and Δ y ) or together with the unit-vector notation (for Δ r ). Where units are not shown, SI units are to
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