* A frog jumps at an angle
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- Block A in (Figure 1) is heavier than block B and is sliding down the incline. All surfaces have friction. The rope is massless, and the massless pulley turns on frictionless bearings. The rope and the pulley are among the interacting objects, but you'll have to decide if they're part of the system. igure B < 1 of 1 Draw a free-body diagram for block A. Draw the vectors starting at the black dot. The location and orientation of the vectors ► View Available Hint(s) 0 No elements selected Select the elements from the list and add them to the canvas setting the appropriate attributes. Activate W Go to Settingsarrow_forwardB The picture shows two masses that are attached by a string over a pulley. Block B is falling and dragging block A across the table. Draw a freebody diagram of both block A and block B. Label all the forces with the variables you have learned in Ch 5. If there is more than one force of the same type, make sure you include a subscript to make it unique. Write an expression for Fnet for block A using unit vector notation.arrow_forwardTwo blocks are connected by a massless rope. The rope passes over an ideal (frictionless and massless) pulley such that one block with mass m1 = 12.25 kg is on a horizontal table and the other block with mass m2 = 7.5 kg hangs vertically. Both blocks experience gravity and the tension force, T. Use the coordinate system specified in the diagram. a.) Assuming friction forces are negligible, write an expression, using only the variables provided, for the acceleration that the block of mass m1 experiences in the x-direction. Your answer should involve the tension, T. b.) Under the same assumptions, write an expression for the acceleration, a2, the block of mass m2 experiences in the y-direction. Your answer should be in terms of the tension, T and m2. c.) Carefully consider how the accelerations a1 and a2 are related. Solve for the magnitude of the acceleration, a1, of the block of mass m1, in meters per square second. d.)Find the magnitude of the tension in the rope, T, in newtons.arrow_forward
- You're driving home from the grocery store at 12 m/s with a 7.0 kg bag of groceries on the front seat when the light ahead turns red. Part A What is the shortest distance in which you can stop, after the brakes are applied, without the groceries sliding off the seat? The static and kinetic coefficients of friction are, respectively, 0.65 and 0.45. Assume that the surface of the seat is horizontal. Express your answer with the appropriate units. ► View Available Hint(s) Ax= HÅ Value Units ?arrow_forwardWhen traveling on an airplane you get meals on a serving tray that has large coefficients of static and kinetic friction between the tray and dishes on it. Assume the airplane is moving from left to right. Assume also that the tray is parallel to the velocity of the airplane. c. Draw a force diagram for a cup on a serving tray as seen by a stationary observer on Earth if the airplane is on a runway and slowing down; the cup is sliding. Next to the force diagram draw an arrow that shows the velocity of the cup relative to the airplane.arrow_forwardDraw a diagram of the situation and label the givens in the problem: The cart's mass and the hanger's mass. Also label the direction of the cart and hanger's acceleration. Draw two force diagrams. One for the cart and one for the hanger. You can treat the track as frictionless. Remember that the force in the string will be the same throughout the entire string. Then define an x-y coordinate system and find the x and y components of the forces in your diagrams.arrow_forward
- A brick of mass m = 78 kg slides along a horizontal surface. The coefficient of friction between the brick and the surface is μk = 0.23. The brick has an initial speed of vo = 29 m/s in the positive x-direction as shown. a.) Write an expression for the x-component of the frictional force the brick experiences, Ff, in terms of the given variables and variables available in the palette. b.) What is the magnitude of the frictional force in N? c.) How far will the brick travel, in meters, before coming to rest?arrow_forwardBlock A in (Figure 1) is heavier than block B and is sliding down the incline. All surfaces have friction. The rope is massless, and the massless pulley turns on frictionless bearings. The rope and the pulley are among the interacting objects, but you'll have to decide if they're part of the system. B A Draw a free-body diagram for the block B Draw the vectors starting at the black dot. The location and orientation of the vectors will be graded. The length of the vectors will not be graded. Jarrow_forwardWhen traveling on an airplane you get meals on a serving tray that has large coefficients of static and kinetic friction between the tray and dishes on it. Assume the airplane is moving from left to right. Assume also that the tray is parallel to the velocity of the airplane. Draw the vectors starting at the black dot. The location, orientation, and relative length of the vectors will be graded. The exact length of the vectors will not be graded. a. Draw a force diagram for a cup on a serving tray as seen by a stationary observer on Earth if the airplane is flying horizontally at constant speed; the cup is at rest on the tray.arrow_forward
- When traveling on an airplane you get meals on a serving tray that has large coefficients of static and kinetic friction between the tray and dishes on it. Assume the airplane is moving from left to right. Assume also that the tray is parallel to the velocity of the airplane. Draw the vectors starting at the black dot. The location, orientation, and relative length of the vectors will be graded. The exact length of the vectors will not be graded. a. Draw a force diagram for a cup on a serving tray as seen by a stationary observer on Earth if the airplane is flying horizontally at constant speed; the cup is at rest on the tray. b. Draw a force diagram for a cup on a serving tray as seen by a stationary observer on Earth if the airplane is on a runway and slowing down; the cup is at rest on the tray. c. Draw a force diagram for a cup on a serving tray as seen by a stationary observer on Earth if the airplane is on a runway and slowing down; the cup is sliding. Next to the force diagram…arrow_forwardAn airplane flies at a constant speed in a horizontal straight path. Two horizontal forces act on the plane: the thrust of the propeller and air resistance. Which of the following statements can be correctly drawn from the scenario above? * The plane is being dragged by air, causing it to decelerate. O Forces are acting on the plane, so it will accelerate. O The net force acting on the plane is zero. The thrust of the propeller is greater than the air resistance, causing the plane to move forward.arrow_forwardPart A A block lies on a plane raised an angle e fram the horizantal. Three forces act upon the block: Fw, the force of gravity. Fn. the narmal force; and Fr. the force of friction. The coefficient of friction is large enaugh to prevent the block from sliding (Figure 1). Consider coordinate system a, with the x axis along e plane. Which forces lie along the axes? O Ée arly O F, anly O F. only O ři and F. O ř and F. O řa and F. O ř and řa and ř. Submit Requect Ancwor Part B Which forces lie along the axes af the coordinate system b, in which the y axis is vertical? O F anly O F. anly O F. only O F and P, O ř and F. O F, and F. O řr and Fa and Ě, Submit Request Answer Usually the best advice is to choose a coordinate system so that the acceleration of the system is directly along one of the coordinate axes. If the system isn't accelerating, then you are better off choosing the coordinate system with the most vectors along the coordinate axes. But now you are gaing to ignore that advice.…arrow_forward
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