Block a (0

question 53

Multiple Choice

Block A (0.40 kg) and block B (0.30 kg) are on a frictionless table (see figure) .Spring 1 connects block A to a frictionless peg at 0 and spring 2 connects block A and block B.When the blocks are in uniform circular motion about 0,the springs have lengths of 0.60 m and 0.40 m,as shown.The springs are ideal and massless,and the linear speed of block B is 2.0 m/s.If the spring constant of spring 1 is equal to 30 N/m,the unstretched length of spring 1 is closest to

• A)0.51 m.
• B)0.52 m.
• C)0.53 m.
• D)0.54 m.
• E)0.55 m.

---

Definitions:

Quadratus Femoris

A muscle located in the buttocks responsible for the lateral rotation of the thigh at the hip joint.

Iliacus

A muscle in the pelvis that, together with the psoas major, forms the iliopsoas, which is involved in flexing and rotating the thigh.

Psoas Major

A deep-seated muscle of the back that helps in flexing the hip and the lumbar spine.

Medial Rotation

A rotational movement towards the midline of the body.