(33%) Problem 2: A flea (of mass 6 × 10-7 kg) jumps by exerting a force of 1.4 ×

Question

(33%) Problem 2: A flea (of mass 6 × 10-7 kg) jumps by exerting a force of 1.4 × 10-5 N straight down on the ground. A breeze blowing on the flea parallel to the ground exerts a force of 0.495 × 10-0 N on the flea Randomized Variables fl = 1.4 x 10-5 N T2 = 0.495 × 10-6 N 50% Part (a) Find the direction of the acceleration of the flea in degrees relative to the vertical Gra Ded Pote tan() | | ( acos) Subi Atte (20 deta sinO cosO HOME atan0acotanO sinh0 coshO tanhO cotanhO Degrees O Radians 0 END Submit Hint I give up! Hits: 10% deduction per hint. Hints remaining: 4 Feedback: 10% deduction per feedback. 50% Part (b) Find the magnitude of the net force acting on the flea in Newtons

Explanation / Answer

2. Fnet = f2i + (f1 - mg)j

= (0.495 x 10^-6)i + (8.12 x 10^-6)j

magnitude , F = sqrt(0.495^2 + 8.12^2) x 10^-6

F = 8.135 x 10^-6 N

a = F/ m = 13.6 m/s^2

theta = tan^-1(0.495/8.12) = 3.5 deg

(A) 3.5 deg

(B) 8.135 x 10^-6 N

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