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Let v(t)=2i3tj+t2k\mathbf { v } ( t ) = 2 \mathbf { i } - 3 t \mathbf { j } + t ^ { 2 } \mathbf { k }

Question 70

Multiple Choice

Let v(t) =2i3tj+t2k\mathbf { v } ( t ) = 2 \mathbf { i } - 3 t \mathbf { j } + t ^ { 2 } \mathbf { k } and w(t) =i+3tj+5t2k\mathbf { w } ( t ) = - \mathbf { i } + 3 t \mathbf { j } + 5 t ^ { 2 } \mathbf { k } Then ddt(v(t) ×w(t) ) \frac { d } { d t } ( \mathbf { v } ( t ) \times \mathbf { w } ( t ) ) is


A) 54t2i+22tj+3k- 54 t ^ { 2 } \mathbf { i } + 22 t \mathbf { j } + 3 \mathbf { k }
B) 54t2i22tj+3k- 54 t ^ { 2 } \mathbf { i } - 22 t \mathbf { j } + 3 \mathbf { k }
C) 54t2i22tj3k- 54 t ^ { 2 } \mathbf { i } - 22 t \mathbf { j } - 3 \mathbf { k }
D) 54t2i+22tj3k- 54 t ^ { 2 } \mathbf { i } + 22 t \mathbf { j } - 3 \mathbf { k }
E) 54t2i22tj+3k54 t ^ { 2 } \mathbf { i } - 22 t \mathbf { j } + 3 \mathbf { k }

Correct Answer:

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