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Acceleration of a Block

APPHMC-LZ4D2F

A block of mass $m$ is pushed by a force of magnitude $F$ on a horizontal frictionless surface as shown in the figure.

Assuming that the vertical component of the force is less than the weight of the object, what is the acceleration of the block along the horizontal surface?

A

$\cfrac {F}{m}$

B

$\cfrac {F\cos\theta}{m}$

C

$\cfrac {F\sin\theta}{m}$

D

$\cfrac {F-mg\cos\theta}{m}$

E

$\cfrac {F\cos\theta -mg}{m}$