Question

Use components to calculate the magnitude R and direction of the vector sum (the resultant) R= A + B. Problem 2-Newton's laws, friction force (20 points) A delivery company has just unloaded a crate full of home exercise equipment in your driveway. Suppose you try to move the crate by pulling it by the rope at an angle of 37° above the horizontal. How hard do you have to pull to keep the crate moving horizontally with constant velocity? Weight of the crate is 600 N and uk -0.40 for this crate. Also, find normal force. Problem 3-Frequency and wavelength of sound (10 points) Calculate the wavelength of the sound wave in air at 20°C if the frequency is f = 440 Hz (the

Answer 1

N + F Seu 370 I AF Const, velocity 1319 FC831° + anet = 0 het 600 Using Newtons law, Shay At z Fy=0; N+ Fsiu 37° = 6CON -N = 600 - Ffu. 37° » Fx=0; For 37° - fo! → F 37 = M, N. & Flos7 = Mx 600 - Uk Fleisto F[cos 37° tuk seu 370 = 6ook 600.uk 600 ×ou C337°+ u seist lost otsust = 230.91NT

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