walk into an elevator, step onto a scale, and push the "up" n. You recall that your normal weight is 655 N. Y ▾ Part B When the elevator has an upward acceleration of magnitude 2.90 m/s², what does the scale read? Hint: The reading on the scale is the magnitude of the normal force. Express your answer with the appropriate units. Submit Part C T Submit - Provide Feedback μA Value Request Answer If you hold a 3.45 kg package by a light vertical string, what will be the tension in this string when the elevator accelerates as in the previous part? Express your answer with the appropriate units. HÅ Value 1 Request Answer Units 4 Units Review I Constant ? ? Next >

can u help with part b

Part E Problem: Thinking and Investigation 44. In testing a new material to be used in non-slip door mats. Scientists made a mat made of this new material, and did the following experiment. A force (F) was used to pull a wooden block across the mat as shown below.(5) m μ The size of the force was varied and the data table below shows the size of the force and the block's resulting acceleration. F(N) (m/s²) 20 0.25 25 0.85 30 1.35 35 1.95 Plot the data on the graph below and draw a line of best fit. Extend the line back to the 'y' axis so that you have a y-intercept point and determine the slope of the line. F (N) The industrial standard for the coefficient of friction for non-slip mats is 0.85. a) Using your slope value and your y-intercept value from the graph, determine the coefficient of friction between the block and the mat. b) Would this mat be approved for production based on its coefficient of friction? Briefly explain. 11 of

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Part 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.…

You want to use a rope to pull a 12-kg box of books up a plane inclined 30° above the horizontal. The coefficient of kinetic friction is 0.28. The rope pulls parallel to the incline. Part A What force do you need to exert on the rope if you want to pull the box at constant speed. Express your answer with the appropriate units.

Part A Find the magnitude of the force needed to accelerate a 300 g mass with a -0.235 m/s2 i+0.390 m/s2 j. Express your answer to two significant figures and include the appropriate units. ? Value Units F = Request Answer Submit Part B Find the direction of this force Express your answer to two significant figures and include the appropriate units. ? Value Units Request Answer Submit

Two students want to determine the coefficient of kinetic friction of leather on oak for an experiment in their physics class. They have a block wrapped in leather that weighs 2.2 kg and notice that when they pull the block with a spring scale, the maximum force it reaches before Nie block starts to move is 13 N, and after the block starts to move the scale reads 11 N. What is the coefficient of kinetic friction? a. 5.9 b. 0.51 с. 5.0 d. 0.60

Pls answer asap. Thank you Note: Computation must be complete and answer in 2 decimal places.

help!! Please, im on my last attempt, below are my attempted answers and were wrong, pls help me