A Vertical Spring Is Compressed And, When Released, Applies a Force

question 71

Multiple Choice

A vertical spring is compressed and, when released, applies a force during a 0.25 s time interval to a 17 g frog, which is flung upward due to the applied force from the spring. If the frog attains an upward velocity of 11 m/s after being released from the spring, what average upward force was applied by the spring?

• A) 0.21 N
• B) 0.91 N
• C) 0.75 N
• D) 0.17 N
• E) 0.58 N

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Definitions:

Active Range

The range of motion of a joint or muscle that can be achieved through muscular contraction without external assistance.

Knee Joint

A complex hinge joint in the leg that connects the thigh bone (femur) to the shin bone (tibia), enabling flexion and extension movements.

Protract

To draw out or lengthen in time; extend.

Retract

To draw back or withdraw, often used in the context of statements being taken back or anatomical parts being pulled towards the body.