Consider the collision of a karate expert's hand with a concrete block. Based on the graphs in the figure below, the initial downward velocity of the fist with mass 0.50 kg is about −12.5 m/s and the collision time is approximately 25 ms. Find the impulse (in kg · m/s) and the average force (in N) exerted on the block by the fist during the collision. (Indicate the direction with the signs of your answers.) impulse...... kg · m/s average force....... N

Consider the collision of a karate expert's hand with a concrete block. Based on the graphs in the figure below, the initial downward velocity of the fist with mass 0.50 kg is about −12.5 m/s and the collision time is approximately 25 ms. Find the impulse (in kg · m/s) and the average force (in N) exerted on the block by the fist during the collision. (Indicate the direction with the signs of your answers.) impulse...... kg · m/s average force....... N

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter17: Energy In Thermal Processes: The First Law Of Thermodynamics

Section17.5: The First Law Of Thermodynamics

Problem 17.4QQ

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Question

Consider the collision of a karate expert's hand with a concrete block. Based on the graphs in the figure below, the initial downward velocity of the fist with mass 0.50 kg is about

−12.5 m/s

and the collision time is approximately 25 ms.

Find the impulse (in kg · m/s) and the average force (in N) exerted on the block by the fist during the collision. (Indicate the direction with the signs of your answers.)

impulse...... kg · m/s

average force....... N

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