Question

Match the block diagrams of block of mass m, with their corresponding free body diagram. (spring consent is kand x is change in spring length).

• A. p-(i); q-(i); r-(iii); s-(vi)
• B. p-(ii); q-(i); r-(iii); s-(vi)
• C. p-(i); q-(ii); r-(iii); s-(vi)
• D. p-(i); q-(i); r-(iv); s-(v)

Answer 1

The correct option is A

p-(i); q-(i); r-(iii); s-(vi)

(p) The spring is extended; therefore it will pull the block with a force of kx

$\therefore$ Free Body Diagram$\to$

(q)This case, the spring is compressed and is pushing the block upwards.(Note$\to$ No normal force)

$\therefore$

(r) The spring is compressed and is pushing down on the block.

(s) Spring is compressed

$\therefore$

There will also be a normal force from the vertical wall.