3) A 2.0 kg box sliding along a smooth floor with a velocity of 10.0 m/s hits a rough patch and slides to a stop in 2.0 s.
a. Draw a free body diagram for this problem. (5 pts.)
b. What is the frictional force on the box as it is slowing to a stop? (5 pts.)
c. What is the coefficient of kinetic friction between the box and the floor?
(5 pts.)

Athermometer is removed from a room where the temperature is 70° f and is taken outside, where the air temperature is 10° f. after one-half minute the thermometer reads 60° f. what is the reading of the thermometer at t = 1 min? (round your answer to two decimal places.) ° f how long will it take for the thermometer to reach 30° f? (round your answer to two decimal places.)

If a negatively charged particle is placed at rest in an electric potential field that increases in the positive x-direction, what will the particle do? a. accelerate in the positive x-direction b. remain at rest c. accelerate in the negative x-direction

Which describes increasing the efficiency of energy resource