3. Two 13 kg boxes containing gazelle food at fastened to the ceiling of an elevator as shown. The elevator accelerates upward at the rate of 2.2 m/s². Find the tension in each rope. FBD: ΣΕ: FBD: ΣFy: +1 ΣΕ: VFg ΣFy: FTI FTI DO M1 FT2 FT2

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4. The 1.0 kg physics book in ngure is connected by a string to a 500 g cof ch un the slope and relcased with a speed of 3 m/s. The cocefficient of fri a) What is the acceleration of the objects? b) Draw a force diagram for an individual item. Find the tension in the rop analyze?) ans 6.73 m s', 1.54 N 20

3. A block of mass m = 5.9 kg is pulled up a 0 = 21° incline as in the figure below with a force of magnitude F = 37 N. (Hint: remember to measure all angles from +x axis.) y a. Draw a free body diagram showing all the forces. NORml Fte F Mass = 5.9k 0-21° F-37N there b. Determine the x and y components of all the forces. X Components of Force f = 37 N Y comporents of Force F=0N X componnt of normal force=ON * Componis of weight=-5.9x 9.8x Sin 210=70. FJN Y Comperents of weight=5.9a 9.8 x Casal. - 53.98 Y Compenents of normal force=mglos H%53.98, c. Write equations summing all the x components and all the y components. F-mg Sm@= mxa 37-20.72= 5.9x a 2.7l6 = Comporunts) Normal force - mg les 0: 05 53.98-53.98-0o d. Find the acceleration of the block if the incline is frictionless. (Give the magnitude of the acceleration. Find the acceleration of the block if the coefficient of kinetic friction between the block and incline is 0.12. (Give the magnitude of the acceleration.) е. 3

nd the acceleration when fistn =0 End the repe tension 10.0kgi

B. inclined track with hanging mass (no friction) T:0011csleyd 1. Set up your track with some angle of inclination 0, as shown in the following figure. Sudinatus ort adr et ma olen s gools botsiolooo 1189 8 to noilor lliw moilom cart a'notwold po 121 cm motion detectors br angle of track: 2.7° predicted acceleration: II. sb uaite track RBO 997 Oute (Pres FIBO rise of I di o no 0 12.70 inomglupa 22sm gaigned ban olluq diw beT 1013515b nonoM 1. Measure the angle of your track. Draw a free body diagram for the cart. (Free body diagram for the hanging object should be the same as in part A.) Predict the acceleration of the cart. de istugmo the I obuoat and the 26.5cm pulley object odont - (noitoll on) szem guigaad diw does all.A A noiros2 101 qu 198 odi awoda wolod sugit odt 150g 1010919b noilom

7. A 100 kg crate is pushed along a level floor at by a constantforce, F= 600 N applied at an angle of 15° above thehorizontal.F=600Na) If the crate is moving at constant speed, what is the valueof the friction force, f?15 degreeb) If the crate is accelerating at 1.5 m/s?, what is the value ofthe friction force, f?W

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A 9 kg object undergoes an acceleration given by a (4î - 3j) m/s? The magnitude of the resultant force acting on the object equals: %3D a. 2025 N Ob.9 N OC. 45 N Od. 225 N