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Lesson_2.2_Homework

# Lesson_2.2_Homework - What will the scale read when the...

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Lesson 7 Homework 1. What is the acceleration of the system shown on the right if m 1 = 2 kg and m 2 = 4 kg. 2. The figure on the right, if there is no friction between the inclined plane and 3.0 kg mass, find the acceleration of the masses and the tension on the string. 3. A rifle weighs 50 N and its barrel is 0.75 m long. It shoots a 25.0-g bullet, which leaves the barrel with a speed of 300 ms -1 after being uniformly accelerated. What is the magnitude of the reaction force on the rifle? 4. A 15-kg traffic light hangs from two cables as shown in the figure above. If the support cables are of equal length and each makes an angle of 37 o with the horizontal, what is the tension in each of the supporting cables? m = 15 kg T T 37 37 o o W = 147 N

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5. An 80-kg man weighs himself standing on a scale in an elevator.
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Unformatted text preview: What will the scale read when the elevator (a) is stationary (b) is ascending with an acceleration of 2.5 ms-2 . (c) is descending with an acceleration of 2.5 ms-2 . (d) is ascending with a uniform velocity of 10 ms-1 . (e) is descending at a constant rate of 10 ms-1 . (f) falls freely after the cables have snapped. 6. m 2 m 1 T 2 T 2 20 kg 10 kg F T 1 A 10-kg block is connected to a 20-kg block by a string. A force applied to the 20-kg block as shown in the figure gives the system an acceleration of 2 ms-2 . Find the tension on each string. 7. 2 kg 19.6 N 5 kg 29.4 N T 2 T 1 T 1 T 2 3 kg In the diagram above: (a) Find the acceleration of the system. (b) Find the tension on each string...
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Lesson_2.2_Homework - What will the scale read when the...

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