Let mP,mQ, and mR be the masses of the bodies P,Q, and R. Step 1: Write the formula for mass using force and acceleration. We know that F=m×a. Rearranging, m=‌
F
a
. Step 2: Find the mass of each body. For P,mP=‌
F
18
For Q,mQ=‌
F
9
For R,mR=‌
F
6
Step 3: Add all the masses to get total mass. mPQR=mP+mQ+mR So, mPQR=‌
F
18
+‌
F
9
+‌
F
6
Find a common denominator: mPQR=‌
F
18
+‌
2F
18
+‌
3F
18
=‌
6F
18
=‌
F
3
Step 4: Find the acceleration of the combined mass with the same force. Acceleration, aPQR=‌
