ele uoubléd, then the force of attraction between Earth and the Moon would be: a

Question

ele uoubléd, then the force of attraction between Earth and the Moon would be: a. one quarter b. one half c. the same d. two times e. four times Computation Questions (20 points each) 1. Assume the three blocks, portrayed in the accompanying Figure, move on a frictionless surface and a 42-N force acts as shown on the 3.0-kg block to the right. Determine (a) the acceleration for this system and (b) the tension in the cord connecting the 3.0-kg and the 1.0-kg blocks. Please show all your work. 42 N 3.0 kg 1.0 kg 2.0 kg

Explanation / Answer

Application of Newton's second law to connected masses. Applied force acts on masses m1 =2 kg, m2 =1kg, m3 =3kg.

a) F = 42 N acceleration a = F / ( m1+m2+m3) =42 / 6 = 7m/s2
b) F - T2 = m3 * a
42 - T2 = 3 * 7 ------ -T2 = 21 - 42 ---- T2 = 21 N

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