Computation. On earth, a block sitting on a frictionless, horizontal table accelerates at 7.13 m/s² when a 21-N horizontal force is applied to it. The block and table are then moved to the moon where the acceleration due to gravity is 1.64 m/s². Find the magnitude of the block's weight wm on the moon. Wm - N D Record your numerical answer below, assuming three significant figures.

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

(Figure 1) shows a F = 6.4 N force pushing two gliders along an air track. The 170 g spring between the gliders is compressed. Assume the force Facts and the whole system moves in the same direction. The spring does not sag. Figure F A 400 g m B 600 g 1 of 1 Part A How much force does the spring exert on glider A? Express your answer to two significant figures and include the appropriate units. F = Submit Part B F = O Submit Value Request Answer How much force does the spring exert on glider B? Express your answer to two significant figures and include the appropriate units. μA Value Units Request Answer ? Units ?

1. Sam, whose mass is 75 kg, takes off across level snow on his jet-powered skis. The skis have a thrust of 200 N and a coefficient of kinetic friction on snow of 0.10. Unfortunately, the skis run out of fuel after only 10 s. A. What is Sam’s top speed? B. How far has Sam traveled when he finally coasts to a stop?