FREE Trial

The foot of a 55 kg sprinter is on the ground for 0.25 s while her body

Question:

The foot of a 55 kg sprinter is on the ground for 0.25 s while her body accelerates from rest to 2.0 m/s.

a. Is the friction between her foot and the ground static friction or kinetic friction?
b. What is the magnitude of the friction force?

Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Answer rating: 37% (8 reviews)

Solution mass of the sprinter m55Kg a The friction between sprinter a...View the full answer


answer-question-section
Answered By
tutor-profile-image
User l_780010
My name is Vikas Rathour.I am persuing B.Sc. Physics from a preatigius university Delhi University and famous College Hansaraj College
0.00 0 Reviews 10+ Question Solved
Related Book For  book-img-for-question
Physics for Scientists and Engineers A Strategic Approach with Modern Physics

Physics for Scientists and Engineers A Strategic Approach with Modern Physics

ISBN: 978-0133942651

4th edition

Authors: Randall D. Knight

See More Books
Question Posted:
See More Questions

Related Video

Static friction and kinetic friction are two types of friction that occur when two objects are in contact with each other. Static friction is the force that must be overcome to initiate motion between two surfaces that are in contact with each other but are not moving relative to each other. It is caused by the interlocking of rough surfaces at the microscopic level, and it increases as the force pushing the surfaces together increases. Once motion between the surfaces starts, the static friction is no longer present. Kinetic friction, also known as sliding friction, is the force that opposes the motion of two surfaces that are in contact with each other and are moving relative to each other. It is caused by the rubbing of the surfaces against each other and the resistance of the molecules in the surfaces to being moved. Kinetic friction is generally less than static friction, but it can still be a significant force, especially at high speeds. Both static and kinetic friction can be quantified using a coefficient of friction, which is a dimensionless number that represents the ratio of the frictional force between two surfaces to the normal force (the force perpendicular to the surfaces). The coefficient of static friction is typically greater than the coefficient of kinetic friction for a given pair of surfaces, because it takes more force to overcome the interlocking of the surfaces at rest than to maintain motion once it has started.

Students also viewed these Physics questions

Spad Fighters In Action Aircraft No 93 1st Edition - ISBN: 0897472179 - Free Book