Newton’s second law for the system of two boxes in the x-direction is given by:
F - f
k = (m + M )a
F - µk (m + M )g = (m + M )a
⇒ a = (F/m + M) - µkg = (150N / (4kg+10kg)) - 0.6(9.8m/s² ) = 4.83m/s²
For the top box, we get fs = ma = 4kg x 4.83m/s² =19.3N
So if you have r^2 + 4s and r=4 and s = 1.5 r^2 is 4^2 which is 16 and 4s is 1.5 x 4 which is 6 so you do 16 + 6 which is 22 so the correct answer is a.
Answer:
205
Step-by-step explanation:
2\5 + 2\4
Lcm of 4 and 5 is 20
So 20 divided by 5 is 4 × 2 = 8 and 20 divided by 4 is 5 × 2 = 10
10+ 8 =18\20 = 9\10
