2) a 5 lb force pulls at an angle of 25º, as measured counterclockwise from the +x axis, on a
box having a mass of 7 kilograms. the box is on a horizontal surface and the coefficient of
friction between the box and the surface is 0.20. determine the following:
a) what is the mass of the box expressed in slugs ?
b) what is the weight of the box, expressed in pounds?
c) what is the magnitude of the normal force acting on the box?
d) what is the magnitude of the frictional force acting on the box?
e) what is the net force acting along the line of motion acting on the box?
f) what is the acceleration of the box, expressed in ft/s? ?
g) if the box starts at rest, and the forces act throughout the motion, calculate how far
the object travels in 3 seconds. express the answer in feet.
h) if the box starts at rest, and the forces act throughout the motion, calculate how fast
the box is travelling at 3 seconds. express the answer in ft/sec
i) what is the kinetic energy of the box at 3 seconds (again, the forces act throughout
the motion)? express your answer in both ft lbs.