Question 17

U=-Pär ref Example Why negative Example

Question 20

20. Two identical stars, a fixed distance D apart, revolve in a circle about their mutual center of mass, as shown above. Each star has mass M and speed V . G is the universal gravitational constant. Which Of the following is a correct relationship among these quantities? (A) (B) (C) (D) = GM/D V2 = GM/2D V2 = GM/D2 = MGD = 2GM2/D


Question 33

Ρ = τω

force x linear distance power — time torque x (r x angular speed >< t) torque >< angular speed.

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