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Energy is a scalar quantity.

Answer2: It depends on the angle!

Energy can be a scalar or a vector; consider the vectors F force and D displacement:

FD = -F.D + FxD = |FD| (cos(angle) + v sin(angle)).

F.D is called work a form of energy and is a scalar; FxD is called Torque and is a vector form of energy. both work and Torque have units of joules or newton times meters.

Energy like many quantities in physics is a quaternion consisting of a scalar part and a vector part; E = Escalar + Evector = E(cos(angle) + v sin(angle)), whether the quantity is a scalar or a vector or both depends on the angle.

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