Published by:
CGP EDU Academic Team
Published on: September 12, 2026
The masses of 10 kg and 20 kg respectively are connected by a massless spring as shown in figure. A force of 200 N acts on the 20 kg mass. At the instant shown, the 10 kg mass has acceleration 
. What is the acceleration of 20 kg mass
A
B
C
D
Zero
Text Solution
Verified by ExpertsThe correct answer is:
B
As the mass of 10 kg has acceleration 12 m/s 2 therefore it apply 120N force on mass 20kg in a backward direction.
∴ ∴ Net forward force on 20 kg mass = 200 – 120 = 80N
Acceleration 
.
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