Peoples Physics Book Version-3

5.2. Newton’s Laws Explained http://www.ck12.org

1. zero
   2.−kx 0


2. b.f 1 =μkm 1 g cosθ;f 2 =μkm 2 g cosθ

MEDIA

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c. Ma d.TA= (m 1 +m 2 )(a+μcosθ)andTB=m 2 a+μm 2 cosθe. Solve by usingd= 1 / 2 at^2 and substituting

hford

1. Yes, because it is static and you know the angle andm 1


2. Yes,TAand the angle gives youm 1 and the angle andTCgives youm 2 ,m 1 =TAcos 25/g andm 2 =
   TCcos 30/g


3. a. 3 seconds d. 90 m
   37..
   38..
   39..


4. a. 1.5 N; 2.1 N; 0. 71