Q2/ if you want to lift a weight from the ground and it's weight is more than 10 kg, what are the recommendation that should be considered when you lift this weight? Explain your answer depending on Newton's law?
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- 1 This loudspeaker has a weight of 70 Newtons and is being held up by two cables. Both cables are at an angle of 25 degrees. This means that they both have the same tension, T. What is the vertical component of the tension in each cable? Ty %D unit What is the horizontal component of the tension in each cable? Tx unit What is the total tension in each cable? T = unit %3DB1Mary applies a force of 80 N to push a box with an acceleration of 0.40 m/s². When she increases the pushing force to 86 N, the box's acceleration changes to 0.63 m/s². There is a constant friction force present between the floor and the box. (a) What is the mass of the box in kilograms? 200 X Consider applying Newton's Second Law to each of the pushing forces. kg (b) What is the coefficient of kinetic friction between the floor and the box? -0.020 X What is the relation between friction force and normal force? Did you apply Newton's Second Law to motion in the vertical direction?
- Q3. The refrigerator has a weight of 80 kg and rests on a tile floor for which u.= 0.25. also the man has a weight of 70 kg and the coefficient of static friction between the floor and his shoes is µ = 0.5. If he pushes horizontally on the refrigerator, determine if he can move it. If so. does the refrigerator slip or tip? Take g=10m/s² 1.0m 10 1.2m 0.5m A 1.0mAt an instant when a soccer ball is in contact with the foot of the player kicking it, the horizontal or x component of the ball's acceleration is 830 m/s² and the vertical or y component of its acceleration is 720 m/s². The ball's mass is 0.48 kg. What is the magnitude of the net force acting on the soccer ball at this instant? Number Units6A. ficA donkey pulls a block across a rough horizontal surface at constant speed v by applying force F, as shown below. The arrows in the diagram correctly indicate the directions, but not necessarily the magnitudes, of the various forces on the block. Which of the following pairs of relations among the force magnitudes W, k, N and F must be true? a. F=k and N= W 1 p0ol boilgge ots (0) 3onol aoiton o (d) not lanoiinitveg o (o) i2e looge oma2 or N 10 ,wole stal ovom xod od 2o0 (b) b. F=k and N> W c. F=k and Nk and N= W F e. F>k and Nk and N>W g. FW i. FMary applies a force of 78 N to push a box with an acceleration of 0.40 m/s2. When she increases the pushing force to 90 N, the box's acceleration changes to 0.66 m/s?. There is a constant friction force present between the floor and the box. (a) What is the mass of the box in kilograms? kg (b) What is the coefficient of kinetic friction between the floor and the box?The question refers to a coin which is tossed straight up into the air. After it is released, it moves upward, reaches its highest point and falls back down again. Use one of the following choices (A through G) to indicate the force acting on the coin in the case described below. Answer choice J if you think that none is correct. Ignore any effects of air resistance. The coin is moving downward. A. The force is down and constant. B. The force is down and increasing C. The force is down and decreasing D. The force is zero. E. The force is up and constant. F. The force is up and increasing G. The force is up and decreasing O A O ΟΕ D OF O o Jfour forces act on an object, given by A=32.3 N, east B=50.3 N north, c = 82,7 n west, and d=72.7 n south ( assume east and north are directed along the + x-axis and y+-axis respectively.) a. what is the magnitude of the net force (in N) on the object? b. what is the direction of the force? ( enter your answer in degree counterclockwise from the +x-axis.)