APFIVE Acceleration on a Frictionless Incline
A block of mass m slides down a frictionless plane inclined at an angle θ with the horizontal. Which of the following describes the condition for the block’s speed to increase?
A
mg sin θ > 0
B
The normal force must be decreasing
C
The angle θ must be increasing with time
D
mg cos θ > mg sin θ
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