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- Consider an object sliding down a frictionless ramp that is inclined an angle above the horizontal. What should the acceleration down the ramp ar be when the angle becomes zero? ЛУ PM @ 20 83 F ho ▶11 insert } 3 E IL O g D 819 C O R LL % 5 V mg T G 6 B Y & H 7 (99+) U 4+ . 8 1 J N M 144 ( 9 K O L P { alt + [ ? 1 ctrl prt sc backspace 2 pause 9:26 PM 6/1/2022 B 12 delete home enfer pg up ↑ shift pgmoodle.nct.eduom/mod/qi -Learning Portal Courses - Reports - e-Services- Academic Departments - ETC - CIMS - A 17kg crate resting on a horizontal surface is pushed as shown. If the coefficient of static friction u, between the surfaces is 0.24, what is the minimum force (F) required to start the motion? O a 4.08N O b. 70.83N Oc 39.98N Od. 694.17N Windows buut An object of mass Skg is sliding with a constant velocity of 10m/s on a frcitionless horizontal table. The force needed to keep the object moving with the same velocity is. 144 4- # 4. 6. V.hilda was on vacation and went to a mountain. her weight at the base is 540N and at the top she weighs 539.5 N if the gravity acceleration decreases about 0.204 cm/s2 for each 1000 m ascent, find the height in meters of a point aboove the base where her weight decreases by 3.009%
- The parachute on a race car of weight 8 820 N opens at theend of a quarter-mile run when the car is traveling at 35.0 m/s.What total retarding force must be supplied by the parachuteto stop the car in a distance of 1.00 x 103 m?Supposed a 52.5kg gymnast is climbing a rope. What is the tension in the rope, in newtons, if he climbs at a constant speed? What is the tension in the rope if he accelerates upward at a rate of 1.4m/s2A firefighter who weighs 150 lb slides down an infinitely long fire pole that exerts a frictional resistiveforce with magnitude proportional to her speed, with k-2.1 lb-s/ft. Assuming that she starts from rest, findher velocity as a function of time and find her terminal velocity. Don't forget to use the gravitationalconstant that comes from pounds.v(t) =Terminal Velocity =
- A baseball catcher is performing a stunt for a television commercial. He will catch a baseball (mass 145 g) dropped from a height of 60.0 m above his glove. His glove stops the ball in 0.0100 s. What is the force exerted by his glove on the ball?In the figure, the block of mass 2.00 kg accelerates down the inclined plane. The coefficient of kinetic friction is 0.200 and angle of the inclined plane is 30.0°. What is the acceleration of the block? normal force N friction force f mg sine mg cose mg O 3.05 mis? O 5.05 m/s? O 2.05 m/s? O 4.05 m/s?Determine the speed v which the 565-kg four-man bobsled must have in order to negotiate the turn without reliance on friction. Also fınd the net normal force N exerted on the bobsled by the track. 38 -p =59 m Answers: V = i m/s N = i kN
- Bbch A hes a mass of 7kp. Statıc ond khe tic M; =3,4 frictoa coefficients of He inclined surface ore 0.4 and o1, respectively a- Determine mnimuna 9 such thet block storts to sude when initrolly ot rest and released, b-Find its acceleration when it storts to slide O Sketch grophs. a Vo = 0 t いdrawn An object upward 650N- Ihe Coefficient of friction between the object and the plane is. the angle of nclination 30 to Hhe horizontal of na ss 15 K9 1s inclined plane by a force ot an 0-40 and of the plane is t What is the acceleration of the object? b.1f at the top of the plane, Hhe object slide. down freely weight, with what acceleiation does it slide? on the plane under its Own c- What would be the acceleiation If the plane was frictionless?Question 31 What is the acceleration of the box sliding on an inclined plane 24° from the horizontal with a coefficient of kinetic friction of 0.22? O 1.02 m/s- O 2.01 m/s2 O 0.21 m/s? O No answer O 0.12 m/s?