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Imagine looking out at a beautiful sunset behind trees on the horizon. Then you look down at your phone to read a text message. How do the lenses of your eyes accommodate (change) to view a closer object? 

The gravitational pull of the moon is 1/6 that of the earth (about 1.6 m/s2).  One object weighs 30 N on Earth.  A second object weighs 30 N on the moon.  Which object has the greater mass? 

Which has zero acceleration? An object at rest                                                                d.  a, b, and c moving at constant velocity                             e.  none of these in mechanical equilibrium

The ___________________ is a vascular membrane lining the outer surface of the eye and the inner surface of the eyelids

Which neurons tend to be adrenergic?  

The diagram below represents the neural layer of the retina in the eye Which photoreceptor provides the sharpest/clearest vision? (Type the letter not the name)  

You will use this problem for Questions 5 and 6.  Read carefully!  Free body diagrams will be graded in the written work. An apple crate has a weight of 225 N, and is moved across the floor by the 2 forces directed as shown in the diagram. (a)  Draw a free body diagram on your paper.  Use that diagram to find the normal force on the crate. (b)  If μk = 0.12, find the horizontal acceleration of the crate across the floor. For this question, enter the answer to part (b) – the acceleration of the crate.

You will use this problem for Questions 7 and 8.  Read carefully!  Free body diagrams will be graded in the written work. Mass 1 sits on a frictionless table, and mass 2 is attached to mass 1 by a string laid over a pulley as shown in the diagram. If a force of 10 N pulls on mass 1 as shown, (a) find the acceleration of the blocks and (b) find the tension in the string. For this question, enter the answer for part (b) – the tension in the string.

Find the magnitude of the maximum gravitational force between 2 identical bowling balls (m = 7.2 kg, r = 0.11 m).   This answer should be written in scientific notation (for example, 1.234*10^5). However, here you will enter your answer in two parts:  For the first blank, enter the decimal part of the number for your answer, and for the second blank, enter the exponent. [a]*10^[b]

You will use this problem for Questions 5 and 6.  Read carefully!  Free body diagrams will be graded in the written work. An apple crate has a weight of 225 N, and is moved across the floor by the 2 forces directed as shown in the diagram. (a)  Draw a free body diagram on your paper.  Use that diagram to find the normal force on the crate. (b)  If μk = 0.12, find the horizontal acceleration of the crate across the floor. For this question, enter the answer to part (a) – the normal force on the crate.