Pytels Dynamics 12.40: The rocket sled is propelled....

[Alexanddros81]

Homework Statement

The 13-kN rocket sled is propelled along a straight test track. The rocket engine fires for 4 seconds,
producing a propulsive force of F=5.3kN, and then shuts down. Assuming that the sled starts from rest and that the coefficient of kinetic friction is 0.05, determine the maximum speed reached by the sled.

Homework Equations

The Attempt at a Solution

Here is my solution:

Is this correct? (I get the same answer at the back of the book)

 

[haruspex]

Homework Statement

The 13-kN rocket sled is propelled along a straight test track. The rocket engine fires for 4 seconds,
producing a propulsive force of F=5.3kN, and then shuts down. Assuming that the sled starts from rest and that the coefficient of kinetic friction is 0.05, determine the maximum speed reached by the sled.

Homework Equations

The Attempt at a Solution

Here is my solution:

View attachment 208451

Is this correct? (I get the same answer at the back of the book)

Looks good.