A box of books weighing 319 N is shoved across the floor by a force of 485 N exerted downward at an angle of 35° below the horizontal. a) If uk between the box and the floor is 0.57, how long does it take to move the box 4.00 m, starting from rest? b) If uk between the box and the floor is 0.75, how long does it take to move the box 4.00 m, starting from rest?

explanation: in any substance/object, the particles inside it (atoms/molecules) constantly move in random directions and with random speeds (this motion is called brownian motion). as a result, the particles have some kinetic energy (which is proportional to the temperature of the substance).

explanation:

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find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2

ingenuity says that the answer is 2.7 m.