A 15-Kg Block Is on a Frictionless Ramp That Is

Multiple Choice

A 15-kg block is on a frictionless ramp that is inclined at 20° above the horizontal. It is connected by a very light string over an ideal pulley at the top edge of the ramp to a hanging 19-kg block, as shown in the figure. The string pulls on the 15-kg block parallel to the surface of the ramp. Find the magnitude of the acceleration of the 19-kg block after the system is gently released?

A) 4.0 m/s²
B) 3.8 m/s²
C) 4.2 m/s²
D) 4.5 m/s²