A box of mass m is initially at rest at the top of a ramp that is at an angle θ with the horizontal. The
block is at a height h and length L from the bottom
of the ramp. The block is released and slides
down the ramp. The coefficient of kinetic friction
between the block and the ramp is μ. What is the
kinetic energy of the box at the bottom of the
ramp?
a) mgh
b) μmgLcosθ
c) mgh - μmgLcosθ
d) mgL - μmghcosθ

The midpoints? a, b, and c are marked on the histogram. match them to the indicated scores. which? scores, if? any, would be considered? unusual?

If vx = 7.00 units and vy = -7.60 units, determine the magnitude of v⃗ . determine the direction of v⃗ .

You are traveling in a car going at a constant speed of 100km/h down a long, straight highway. you pass another car going in the same direction which is traveling at a constant speed of 80km/h. as measured from your car's reference frame this other car is traveling at −20km/h. what is the acceleration of your car as measured from the other car's reference frame? what is the acceleration of the other car as measured from your car's reference frame?