A proton initially has : 4.0i 2.0j 3.0k and then 4.0 s later has v: 2.0i 2.0j 5.0k (in
Chapter 4, Problem 14(choose chapter or problem)
A proton initially has \(\vec{v}=4.0 \hat{\mathrm{i}}-2.0 \hat{\mathrm{j}}+3.0 \hat{\mathrm{k}}\) and then 4.0 s later has \(\vec{v}=-2.0 \hat{\mathrm{i}}-2.0 \mathrm{j}+5.0 \hat{\mathrm{k}}\) (in meters per second). For that 4.0 s, what are
(a) the proton’s average acceleration \(\vec{a}_{\text {avg }}\) in unitvector notation,
(b) the magnitude of \(\vec{a}_{\text {avg }}\), and
(c) the angle between \(\vec{a}_{\text {avg }}\) and the positive direction of the x axis?
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