Two People Sit Face to Face on Nice Skateboards That

question 21

Multiple Choice

Two people sit face to face on nice skateboards that are free to roll without friction. They push each other with a force of 40 N and move apart. Person X, whose mass (including the skateboard) is 50 kg, moves to the left at 3 m/s. Person Z, whose mass (including the skateboard) is 60 kg,

• A) moves to the right at 2.5 m/s.
• B) moves to the right at 1 m/s.
• C) moves to the right at 4 m/s.
• D) moves to the right at 10 m/s.

Recognize the types of joints associated with the hip and their functional implications.

Understand the basic principles and tools used to measure muscle activity.

Identify and differentiate between types of muscle contractions.

Understand the process and significance of muscle contraction and relaxation phases.