018 (part 1 of 2) 10.0 points An elevator accelerates upward at 1.2 m/s The acceleration...
018 (part 1 of 2) 10.0 points An elevator accelerates upward at 1.2 m/s2. The acceleration of gravity is 9.8 m/s What is the upward force exerted by the floor of the elevator on a(n) 92 kg passenger? Answer in units of N 019 (part 2 of 2) 10.0 points If the same elevator accelerates downwards with an acceleration of 1.2 m/s, what is the upward force exerted by the elevator floor on the passenger? Answer in units of
016 (part 1 of 2) 10.0 points A light, inextensible cord passes over a light, frictionless pulley with a radius of 16 cm. It has a(n) 13 kg mass on the left and a(n) 4 kg mass on the right, both hanging freely. Initially their center of masses are a vertieal distance 2.0 m apart. 5 The acceleration of gravity is 9.8 m/s. 16 cm 13 kg 2.6 m 4 kg At what rate are the two masses accelerat- ing...
008 10.0 points An elevator starts from rest with a constant upward acceleration and moves 1 m in the first 1.8 s. A passenger in the elevator is holding a 4.6 kg bundle at the end of a vertical cord. What is the tension in the cord as the ele- vator accelerates? The acceleration of gravity is 9.8 m/s. Answer in units of N.
012 10.0 points A person weighing 0.7 kN rides in an elevator that has a downward acceleration of 2.5 m/s2. The acceleration of gravity is 9.8 m/s2 What is the magnitude of the force of the 它自 35 PM ort sc delete homen ro 6 + backspace ock 8 4 pause elevator floor on the person? Answer in units of kN 013 (part 1 of 2) 0.0 points A 4.1 kg object is suspended by a string from the ceiling...
018 (part 1 of 2) 10.0 points A 1.01 × 10° kg car accelerates uniformly from rest to 11.5 m/s in 2.32 s. What is the work done on the car in this time interval? Answer in units of J. 019 (part 2 of 2) 10.0 points What is the power delivered by the engine in this time interval? Answer in units ofW.
020 10.0 points A bird is flying with a speed of 14.7 m/s over water when it accidentally drops a 1.60 kg fish The acceleration of gravity is 9.81 m/s4 If the altitude of the bird is 6.40 m and air resistance is disregarded, what is the speed of the fish when it hits tho water Answer in units of m/s 021 (part 1 of 3) 10.0 points A pulley system lifts a 1493 N weight a dis- tance of...
018 (part 1 of 2) 10.0 points A jet aircraft is traveling at 290 m/s in hor- izontal flight. The engine takes in air at a rate of 39.3 kg/s and burns fuel at a rate of 1.37 kg/s. The exhaust gases are ejected at 441 m/s relative to the aircraft. Find the thrust of the jet engine. Answer in units of N. 019 (part 2 of 2) 10.0 points Find the delivered power. Answer in units of W.
018 (part 12of 2) 10.0 pointsGiven: g = 9.8 m/s . A wooden sphere has radius R = 12 cm, density ρwood = 748 kg/m3, and aerodynami- cal drag coefficient D = 0.5. What is the ter- minal speed vt of this sphere falling through the air of density ρair = 1.2 kg/m3? Answer in units of m/s. 019 (part 2 of 2) 10.0 points Now consider the same sphere falling freely without any resistance. From which height hshould it...
(a) An elevator of mass m moving upward has two forces acting on it: the upward force of tension in the cable and the downward force due to gravity. When the elevator is accelerating upward, which is greater, T or w? Tw Both forces are equal. (b) When the elevator is moving at a constant velocity upward, which is greater, T or w? Tw Both forces are equal. (c) When the elevator is moving upward, but the acceleration is downward, which is...
ent 38228286 a e WITHDRAWN 027 (part 1 of 2) 10.0 points A ball thrown vertically upward is caught by the thrower after 1.93 s. Find the initial velocity of the ball. The acceleration of gravity is 9.8 m/s2 Answer in units of m/s. 028 (part 2 of 2) 10.0 points Find the maximum height it reaches. Answer in units of m. 029 10.0 points A car enters the freeway with a speed of 6.9 m/s and accelerates uniformly for...