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BAED-PHYC2121 General Physics 1
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4.4 Further Applications of Newton's Laws
A 10-kg mass and a 6.0-kg mass are connected by a light string over a massless, frictionless pulley. If g = 9.8 m/s2, what is the acceleration of the system when released?❌
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An astronaut applies a force of 450 N to an asteroid, and it accelerates at 9.00 m/s2. What is the asteroid's mass?
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In the case of constant acceleration, the average velocity equals the instantaneous velocity:
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In the text are the following conversion factors:i. 1 mi = 1 609 mii. 1 m = 39.37 in.iii. 1 ft = 30.48 cmiv. 1 in. = 2.54 cmThe 1 on the left hand side is assumed to have the same number of significant figures as the number on the right hand side of each of these equations. However, 2 of these conversion factors are exact, and this means they have the equivalent of an unlimited number of significant figures when used in calculations. Which 2 are the exact conversion factors?
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2.2 What is Motion?
In one-dimensional motion where the direction is indicated by a plus or minus sign, the average velocity of an object has which of the following properties?0%
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A 60.0-kg man jumps 1.00 m down onto a concrete walkway. His downward motion stops in 0.0400 seconds. If he forgets to bend his knees, what force is transmitted to his leg bones?
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Assume when using a meter stick measuring can be done so that the last significant figure is in the tenth of a millimeter digit. If you are measuring an object with length between 25 and 53 cm, how many significant figures will result if you only use the part of the meter stick between the 3- and 85-cm positions?
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An object is dropped from a height. Once it is moving, which of the following statements is true, at least at one point?
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Two objects, A and B, are placed on an inclined plane that can be rotated to different angles of elevation. A starts to slide at twice the angle of elevation that B starts sliding. The respective coefficients for static friction for A and B are μA and μB. Choose the last answer that is correct.
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Vector 
is 5 m long and vector 
is 12 m long. The length of the sum of the vectors must be:
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