Question

62. 4kg 2kg 30° Find the acceleration of the 2 kg block. 20 (a) (b) 5 m/s2 6 (c) 0 m/s2 (c) none m/s2​

Answer 1

Concept;

• same massless string will have same tension throughout it.
• as the blocks are moving together, they will have same acceleration.

Solution:

First, mark all the forces for each blocks.

4kg block

• 4gsin30° -T = 4a
• 2g - T = 4a --------------(1)

2kg block

• T - 2g = 2a --------------(2)

•Adding equations 1 and 2

2g - T = 4a

T - 2g = 2a

》a = 0 m/s

★ so, acceleration of 2kg block is 0m/s²

Answer 2

Answer:

0 m/s²

Explanation:

1st, we need to understand that due constraint relation on string, the bodies will have same a.