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sunsetlove
 3 years ago
With a force of 21 N, Lisa pulls a wagon with her little brother. The handle of the wagon makes a 15° angle with the ground.
Approximately what force will move the wagon vertically upwards?
Answer
28.57 N
20.28 N
5.63 N
5.44 N
.
4 points
Question 4
MA.912.D.9.3
A stack of KRails, used for highway construction, are pulled along a ramp angled 31° to the ground with a force 10,545 N as shown below.
What is the horizontal force required to pull the KRails?
Answer
5431.08 N
6336.08 N
9038.83 N
sunsetlove
 3 years ago
With a force of 21 N, Lisa pulls a wagon with her little brother. The handle of the wagon makes a 15° angle with the ground. Approximately what force will move the wagon vertically upwards? Answer 28.57 N 20.28 N 5.63 N 5.44 N . 4 points Question 4 MA.912.D.9.3 A stack of KRails, used for highway construction, are pulled along a ramp angled 31° to the ground with a force 10,545 N as shown below. What is the horizontal force required to pull the KRails? Answer 5431.08 N 6336.08 N 9038.83 N

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cse
 3 years ago
Best ResponseYou've already chosen the best response.0Free body diagram incoming..

cse
 3 years ago
Best ResponseYou've already chosen the best response.0The free body diagram for the first problem is:

cse
 3 years ago
Best ResponseYou've already chosen the best response.0Note what you have is a force vector with magnitude 21 N at an angle of 15 degrees. And you want the vertical component of the vector e.g. the upward force

cse
 3 years ago
Best ResponseYou've already chosen the best response.0Any vector is just the sum of its horizontal and vertical components. See:

cse
 3 years ago
Best ResponseYou've already chosen the best response.0So y = 21 N * sin (15) = 5.44

cse
 3 years ago
Best ResponseYou've already chosen the best response.0For the second problem you do the same thing, draw a fbd, decompose the force vector

cwrw238
 3 years ago
Best ResponseYou've already chosen the best response.1for second question horizontal force is 10545* cos 31 = 9038.83 N

sunsetlove
 3 years ago
Best ResponseYou've already chosen the best response.2thank u guys for explaining it
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