1) (2 pts) Three equal forces are applied to a door (shown from above with the h
ID: 1482662 • Letter: 1
Question
1) (2 pts) Three equal forces are applied to a door (shown from above with the hinge at left) at the same spot but at different angles. Which of the following is correct? A) Fs generates zero torque. B) F: generates the most torque. C) The torque generated by Fa is a vector pointing out of the page. D) All of these are correct. 2) (2 pts) A metal hoop and a solid wood cylinder have the same mass and the same radius, but in a race between these two objects down an incline, the wood cylinder wins because it has A) a larger moment of inertia and less translational kinetic energy at the bottom. B) a larger moment of inertia and less rotational kinetic energy at the bottom. C) a smaller moment of inertia and less translational kinetic energy at the bottom. D) a smaller moment of inertia and less rotational kinetic energy at the bottom. 3) (2 pts) A merry-go-round is rotating counterclockwise when seen from above. The merry-go-round's angular velocity is a vector that points B) counterclockwise. D) down. C) up 4) (2 pts) An ice skater performs a pirouette (a fast spin) by pulling her outstretched arms in closer to her body. How does this action affect her rotational inertia? A) Her rotational inertia increases B) Her rotational inertia decreases. C) Her rotational inertia does not change. D) Her rotational inertia changes, but it is impossible to tell if it increases or decreases. 5) (2 pts) The buoyant force experienced by a fish submerged in water depends on A) the weight of the fish. C) the fish's depth below the surface. E) Both C and D are correct. B) the density of the fish. D) the weight of the water it displaces.Explanation / Answer
(3) Ans: B Counter clockwise.
Explanation: The dirction of velocity is always towards the derection of tangent .Hence Tangent at for each point changes veocity also changes and finally it gives the direction same as the direction of motion of object,
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