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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
 2 years ago
 2 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
 2 years ago
 2 years ago

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cseBest ResponseYou've already chosen the best response.0
Free body diagram incoming..
 2 years ago

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

cseBest ResponseYou've already chosen the best response.0
Note 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
 2 years ago

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

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

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

cwrw238Best ResponseYou've already chosen the best response.1
for second question horizontal force is 10545* cos 31 = 9038.83 N
 2 years ago

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