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View Policies Show Attempt History Current Attempt in Progress A gymnast does a dismount and lands on a mat. During the time interval she is in contact with the mat and is slowing down, the average net force on her is \( \langle 0,2000,0\rangle \mathrm{N} \). The gravitational force by Earth on the gymnast has a magnitude of 590 N . The mat maximally compresses 1.8 cm during the impact. (Assume her body is stiff during the landing, which is not the best technique.) Part 1 Your answer is incorrect. What is the time interval of the impact? (i.e. the time interval between when she first touches the mat and when she comes to rest.) \( \Delta t= \) i ! s Hint Assistance Used You will need the mass of the gymnast. Apply the Momentum Principle to the gymnast during the collision with the mat. Note that her final \( y \)-velocity is zero. Assume a constant net force, then the average velocity is the one-half the sum of the initial and final velocity of the gymnast. Save for Later Last saved 1 second ago. Attempts: 1 of 3 used Submit Answer Saved work will be auto-submitted on the due date. Autosubmission can take up to 10 minutes.

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A gymnast does a dismount and lands on a mat. During the time interval she is in contact with the mat and is slowing down, the average net force on her is \( \langle 0,2000,0\rangle \mathrm{N} \). The gravitational force by Earth on the gymnast has a magnitude of 590 N . The mat maximally compresses 1.8 cm during the impact. (Assume her body is stiff during the landing, which is not the best technique.)

Part 1

Your answer is incorrect.

What is the time interval of the impact? (i.e. the time interval between when she first touches the mat and when she comes to rest.)
\( \Delta t= \)
i
! s

Hint
Assistance Used

You will need the mass of the gymnast. Apply the Momentum Principle to the gymnast during the collision with the mat. Note that her final \( y \)-velocity is zero. Assume a constant net force, then the average velocity is the one-half the sum of the initial and final velocity of the gymnast.
Save for Later
Last saved 1 second ago.
Attempts: 1 of 3 used
Submit Answer
Saved work will be auto-submitted on the due date. Autosubmission can take up to 10 minutes.

View Policies
Show Attempt History

Current Attempt in Progress

A gymnast does a dismount and lands on a mat. During the time interval she is in contact with the mat and is slowing down, the average net force on her is ⟨ 0,2000,0⟩N. The gravitational force by Earth on the gymnast has a magnitude of 590 N . The mat maximally compresses 1.8 cm during the impact. (Assume her body is stiff during the landing, which is not the best technique.)

Part 1

Your answer is incorrect.

What is the time interval of the impact? (i.e. the time interval between when she first touches the mat and when she comes to rest.)
Δ t=
i
! s

Hint
Assistance Used

You will need the mass of the gymnast. Apply the Momentum Principle to the gymnast during the collision with the mat. Note that her final y-velocity is zero. Assume a constant net force, then the average velocity is the one-half the sum of the initial and final velocity of the gymnast.
Save for Later
Last saved 1 second ago.
Attempts: 1 of 3 used
Submit Answer
Saved work will be auto-submitted on the due date. Autosubmission can take up to 10 minutes.

Added by Lidia A.

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