.Object A and object B are identical and both start out at the same position but
ID: 1795990 • Letter: #
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.Object A and object B are identical and both start out at the same position but travel different paths before t the end-point different amounts of work have been done on objects A and B. What is true of the RED B) It is non-conservative. 10. A small child is standing on a frictionless, horizontal sheet of ice. The child throws a snowball at another ending up at the same place sometime later During their travels, both objects are subject to the RED force. force? A) It might be conservative. child. What is true about the child that throws the snowball? A) The child does not move. B) The child moves in the same direction as the snowball. e child moves in the direction opposite to that of the snowball. D) None of the other answers is the time rate of doing work A) energy B)i C) moment of inertia D)P.E E) power 12. An object is turning clockwise relative to the page. What is the direction of it angular velocity vector? A) clockwise B) counterclockwise into the page D) out of the page 13. In a collision, two objects collide and then separate going off in different directions. If the total momentum of the two-particle system and the total kinetic energy are conserved, what type of collision occurred? B) inelastic C) completely inelastic D) None of the other answers. 14. Reversibility of the work done by a foree is a property of a force? A) conservative B) non-conservative 15. An object in freeal reaches terminal velocity when the downward pull of gravity on it is equal to the upward force on it caused by air drag! The force due to air drag is B) non-conservative ? A) conservative 16. The change in momentum of a particle during a time interval equals theof the net force that acts on the particle during that interval. A) energy Ise C) moment of inertia D) momentum E) powerExplanation / Answer
9.
Path independent forces are conservative.
So the answer is A
10)
Using Newton's third law, the child must move in the opposite direction of the ball.
Answer is C
11)
Energy (J) / time (s) = Power (W)
So answer is E.
12)
We can find the direction of the angular velocity using right hand rule. When we curl our finger in clockwise direction, our thump is into the page
Answer is C.
13)
Elastic collisions conserve both momentum and kinetic energy.
Answer is A
14)
Reversibility of work done is the property of conservative force.
Answer is A
15)
Since frictional forces are non-conservative, the air drag is non-conservative.
Answer is B
16)
m dv = impulse
Answer is B
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