Question

A sled having a certain initial speed on a horizontal surface comes to rest after traveling 20 m. If the coefficient of kinetic friction between the object and the surface is 0.20, what was the initial speed of the object

Answer 1

The initial speed of the object was 6.26 m/s.

Acceleration of the sled, a = -g*μk

= -9.8*0.2

= -1.96 m/s^2

Let u is the initial speed and v is the final speed.

Applying, v^2 - u^2 = 2*a*d

0^2 - u^2 = 2*(-1.96)*10

u = sqrt(2*1.96*10)

= 6.26 m/s

The kinetic friction coefficient μok is the ratio of the friction force to the normal pressure experienced by a body moving on a dry, non-easy floor. The determination of μok may be achieved quite appropriately through an alternative creative mechanism described with the aid of Timoshenko

The coefficient of friction (fr) is quite a number that is the ratio of the resistive force of friction (Fr) divided with the aid of the everyday or perpendicular force (N) pushing the items collectively. it is represented by the equation: fr = Fr/N.

Learn more about friction here brainly.com/question/24338873

#SPJ4