AIEEE Exam

An object moving along the x axis is acted upon
by a force Fx that varies with position as shown.
How much work is done by this force as the
object moves from x = 2 m to x = 8 m?
(A) –10 J (B) +10 J (C) +30 J (D) –30 J

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AIEEE Other Question
A car travels in a flat circle of radius R. At a
certain instant the velocity of the car is 20 m/s
north, and the total acceleration of the car is
2.5 m/s2 37° south of west. Which of the
following is correct ?
(A) R = 0.40 km, and the car’s speed is decreasing
(B) R = 0.20 km, and the car’s speed is decreasing
(C) R = 0.20 km, and the car’s speed is increasing
(D) R = 0.16 km, and the car’s speed is increasing A certain object floats in fluids of density
(a) 0.9 ρ0 (b) ρ0
(c) 1.1ρ0
Which of the following statements is true ?
(A) the buoyant force of fluid (a) is greater than
the buoyant forces of the other two fluids
(B) the buoyant force of fluid (c) is greater than
the buoyant forces of the other two fluids
(C) the three fluids exert the same buoyant force
(D) the object displace the same volume of all
three fluids