15. a body moving with a velocity of 20 m/s begins to accelerate at 3 m/s2. how far does the body move in 5 seconds? a. 137.5 m b. 196 m c. 260 m d. 162.5 m

Answer is B. According to the equation of motion s = vt + 1/2 at2 Where s is distance covered, v is velocity, a is acceleration and t is time taken. So, by putting all the values, we get s = (20)(5) + 1/2 (3)(5)2 s = 100 + 1/2 (3)(25) s = 100 + 1/2 75 s = 100 + 37.5 s = 137.5 meters

The Correct answer to this question for Penn Foster Students is: 137.5 m

there are no contact forces mentioned on the list of choices that you've provided.

305.7

explanation:

density =m/v

density =917/3.00

density = 305.

approximately = 305.7

in four significant figures