Asled of mass 2.12 kg has an initial speed of 5.49 m/s across a horizontal surface. the coefficient of kinetic friction between the sled and surface is 0.229. what is the speed of the sled after it has traveled a distance of 3.89 m?

The speed of the sled is 3.56 m/s

Explanation:

Given that,

Mass = 2.12 kg

Initial speed = 5.49 m/s

Coefficient of kinetic friction = 0.229

Distance = 3.89 m

We need to calculate the acceleration of sled

Using formula of acceleration

Where, F = frictional force

m = mass

Put the value into the formula

We need to calculate the speed of the sled

Using equation of motion

Where, v = final velocity

u = initial velocity

a = acceleration

s = distance

Put the value in the equation

Hence, The speed of the sled is 3.56 m/s.

pythagoras' theorem

square root (-5^2+9^2)

square root (25+81)

square root (106)

angle is tan^-1(9/5)

neg x, pos y