(C) They are both the same (D) Cannot be determined without knowing the (E) None
ID: 1782671 • Letter: #
Question
(C) They are both the same (D) Cannot be determined without knowing the (E) None of the above ball's mass l is replaced with a disk of rotational inertia (1/2)MR', change? (A) The disk will travel faster (B) The disk will travel slower (C) The disk will move at the same speed (D) Cannot be determined without knowing the ball's mass (E) None of the above how will the velocity at the bottom 15. The buoyant force on an object is dependent orn a) the object's density. the submerged volume of the object. c) b) the mass of the object. d) the shape of the object. 16·The buoyant force on an object submerged in a fluid depends on a) the object's density. b) the fluid's density. c) the acceleration due to gravity ,d) e) (a) and (b) but not (c) (b) and (e) but not (a). 17. The property that most determines whether or not an object will foat in oil is the objec's a) weight. b) mass. / e) density. d) volume. 18. An object is placed in a fluid. The buoyant force on the object is proportional to 4) (b) and (e) but not (a). e) (a) and (b) and (c). a) the density of the object b) the volume of the object. c) the density of the fluid. Does the air exert a buoyant force on my pen if I throw it across the room? a) Yes 19. There is not enough information. e) b) No Two wheels are fixed to each other and are free to rotate about a frictionless axis through their concentric center. As shown above four forces are exerted tangentially the wheels. The magnitude of the net torque is 20. (A) zero (B)FR (C) 2FR (D)4FR (E) 8FRExplanation / Answer
(14) (B) disk will travel slower
Because the ball has less inertia (2/5 MR^2) than disc (1/2 MR^2)
(15) (C) Submerged volume of the object
F = (rho)liquid x Vdisplaced x g
(16) (e) b and c not a
F = (rho)liquid x Vdisplaced x g
(17) (C) Density
higher density objects will sink lower density liquids.
(18) (C) Density of the fluid
F = (rho)liquid x Vdisplaced x g
Force directly proportional to : Density of liquid
Volume displaced by object
gravitational acceleration
(19) (a) yes
Air also has resistance but that is very less.
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