A box sliding down a hill going 3m/s accelerates at 2m/s2. How fast is going after 4 seconds.

Which of the following represents an upright image? a. -do b. +m c. -m d. +do

Yvette hangs a 2.4kg bird feeder in the middle of a rope tied between two trees. the feeder creates a tension of 480 n in each side of the the rope.

Aprotein molecule in an electrophoresis gel has a negative charge. the exact charge depends on the ph of the solution, but 30 excess electrons is typical. what is the magnitude of the electric force on a protein with this charge in a 1600n/c electric field? write in two significant numbers, and also in newton