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Picture a cart with an inclined top surface (see diagram). Assume $\theta = 30.0 ^o$.

At what rate must the cart accelerate to the side to keep a frictionless block on it from sliding off?

A

$4.9 m/s^2$

B

$5.7 m/s^2$

C

$8.5 m/s^2$

D

$17.0 m/s^2$

E