Question

The acceleration of man of mass 40 kg plus block of 10 kg system shown in figure, if the man applies a force 30 N on the string (the plane in fixed, smooth and horizontal, also assume that the string is horizontal)

• A. 0.6 m/s²
• B. Zero
• C. 1.2 m/s²
• D. 2.4 m/s²

Answer 1

Answer: (C)

1.2 m/s²

Answer 2

a_CM = $\frac { \mathrm { F } _ { \mathrm { ext } } } { \text { Mass of system } }$ = $\frac { 60 } { 50 }$ = 1.2 m/s²