smplex1fall03

# smplex1fall03 - Sample Exam Phys 111HSS Here are some...

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Sample Exam Phys 111HSS Here are some useful equations Vectors: A x = A cos θ ; A y = A sin θ ; A = 2 y 2 x A A + ; θ = tan -1 x y A A ; A = A x i + B x j One-dimensional motion : x = v avr t ; x = v o t + 1 2 at 2 , a 2 v v x 2 0 2 - = ; v = v o + at; 2 2 1 v v v avr + = ; Free-fall: y = v o t - 2 1 gt 2 , v = v o - gt, g 2 v v y 2 o 2 - - = ; g v y 2 2 0 max = Projectile motion : x = v ox t ; y = v 0y t - 1 2 gt 2 ; v y = v oy - gt; v = v x i + v y j v ox = v o cos θ ; v oy = v o sin θ ; g 2 v v y 2 oy 2 y - - = ; R = v g o 2 2 sin ; θ 2 0 2 ) cos ( 2 ) (tan θ θ v gx x y - = Dynamic: F net = ma; F netx = ma x ; F nety = ma x ; F g = mg, ; g = 9.8 m/s 2 ; incline: F gx = mgsin θ , F gy = mgcos θ , Friction: f s,max = μ s N; f k = μ k N ; Circular motion: a c = R v 2 ; period T = v R 2 π ; F net = r mv 2 ; ______________________________________________________________________________________________ 1. If A vector has magnitude 12 and B vector has magnitude 8, the x component of A + B vector is about A) 15.5 B) 27.6 C) 32.0 D) 44.8 E) 55.2 ______________________________________________________________________________________________________ ____ 2. A cart with an initial velocity of 12 m/s to the right experiences a constant acceleration of a = 2 m/s 2 to the left. What is the cart's displacement during the first 4 s of its motion? A) 64 m B) 48 m C) 32 m D) 12 m E) 4 m ______________________________________________________________________________________________________ _____ 3. An object moves 4 m north and then 3 m east. The magnitude of displacement vector R is closest to: A) 1 m B) 2 m C) 3 m D) 4 m E) 5 m ______________________________________________________________________________________________________ _____ 4. The slope of a velocity versus time graph gives A) position B) velocity C) acceleration D) displacement

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E) none of the above ______________________________________________________________________________________________________ _ 5. A hockey puck sliding on a frozen lake comes to rest after traveling 200 m. If its initial velocity is 10 m/s, what is the magnitude of its acceleration if that acceleration is assumed constant?
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## This note was uploaded on 03/30/2012 for the course PHYS 111 taught by Professor Moro during the Spring '08 term at NJIT.

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smplex1fall03 - Sample Exam Phys 111HSS Here are some...

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