You place a box weighing 268.3 N on an inclined plane that makes a 42◦ angle with the horizontal.
1 answer:
Answer:
Wy = - 268.3*cos(42) = - 199.38 [N]
Wx = 268.3*sin(42) = 179.52 [N]
Explanation:
To solve this problem we must make a free body diagram, in the attached image we can see a free body diagram.
Taking the inclined X & y axes with the same angle of 42°, we can see that the weight can be decomposed on both axes.
Since the angle is adjacent to the y-axis, we can use the cosine function
Wy = - 268.3*cos(42) = - 199.38 [N]
Wx = 268.3*sin(42) = 179.52 [N]
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Answer:
A 1.0 min
Explanation:
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We see that this occurs at t = 1.0 min, so the half-life of the isotope is exactly 1.0 min.