Two identical particles constitute a system. One remains at rest while the other accelerates at 4 m/s². Find the centre-of-mass acceleration (m/s²).
Physics · Mixed Chapter
JEE Main Practice

Question

Two identical particles constitute a system. One remains at rest while the other accelerates at 4 m/s². Find the centre-of-mass acceleration (m/s²).

G1 Physics · Accepted Answer

Step 1: For equal masses, a⃗cm = (a⃗₁ + a⃗₂)/2. Step 2: One acceleration is zero, the other is 4 m/s². Step 3: acm = (0+4)/2 = 2 m/s².