A box of mass m = 10.0 kg moving at 0.500 m/s is pushed by a…

A box of mass m = 10.0 kg moving at 0.500 m/s is pushed by a force F = {F} N across a horizontal floor.  The applied force is directed at an angle θ = 60.0⁰ as shown in the drawing.  The coefficients of static and kinetic friction between the box and the floor are μs=0.400 and μk=0.300, respectively.  What is the work done by the force F after moving the box a distance of d = 10.0 m in joules?  Please enter your unit as “J”.

In target practice, a thick board stops a bullet at a penetr…

In target practice, a thick board stops a bullet at a penetration depth of {d} cm.  Find the average frictional force that stops the bullet.  Hint, you can use two approaches,  Newton’s Second Law or Law of Energy Conservation to solve this problem.  Express your answer in kN and enter your unit as “kN”.

Bonus: In case you miss an answer, take a moment to think ab…

Bonus: In case you miss an answer, take a moment to think about the issue of hunger in this story. Is there a way to see hunger as symbolic as well as actual or physical? Is it ironic that the tribe is starving and there are twenty cattle near by? Where are the buffalo? (Just something I think about everytime I read this.)  Discuss in a brief paragraph or at least several complete sentences and I will give some points!!