[natalia cipi]

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Quantities associated with a moving vehicle include its velocity, speed, momentum and kinetic
energy.
Which of these quantities will always change if the vehicle changes direction?

A speed and kinetic energy only

B speed and momentum only

C speed, kinetic energy and momentum only

D velocity and kinetic energy only

E velocity and momentum only

F velocity, kinetic energy and momentum only

Discussion

[Nestoras Mous]

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B) velocity and momentum are vector quantities so if the direction changes they change too

[Saad Masri]

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A change in direction means it’s a vector. From the following choices, I believe the answer is E because momentum and velocity both have a magnitude and a direction while kinetic energy doesn’t have a direction.