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Vector calculus — Question 41

Original QCE Vault practice · 1 mark

Q41 · Practice questionSimple familiar1 mark

QUESTION 41

Particle AA follows rA(t)=(t,2t)\mathbf r_A(t)=(t,2t) and particle BB follows rB(t)=(3−t,1+t)\mathbf r_B(t)=(3-t,1+t). Which statement is correct?
(A)
They collide at t=4/3t=4/3.
(B)
They collide at t=5/3t=5/3.
(C)
Their paths cross, but they reach the crossing point at different times.
(D)
Their paths are parallel.
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