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VladimirAG [237]
3 years ago
5

Brant pushes a toy car with a force of 50 N. The force of friction as the car moves is 5 N. What is the net force on the car?

Physics
1 answer:
ICE Princess25 [194]3 years ago
4 0

net force= the sum of all the forces acting on the object

the frictional force is opposite to the direction of motion of the object

If the object moves to the right (positive) then the friction force moves to the left (negative).

so the net force: 50 N - 5 N = 45 N (B)

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The 102N acting on the ropes being pulled by eric and kim have some of that force acting horizontally, and some of it vertically. By visualizing it as a right angled triangle, with the hypotenuse the length of the diagonal force, and each side the length of the horizontal and vertical forces, you can use trigonometry to calculate the length of the vertical force. You are told that it is at an angle of 30 with the vertical rope, therefore you know the length of the hypotenuse, and the angle between it and the vertical force, so using trig: (vertical force=x)
x/102=cos(30)
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Therefore the diagonal ropes give a vertical force of 88.33N, and the centre rope, as it acts vertically, gives a vertical force of all 102N. The total:
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I don't know if this is very clear, I hope its good enough to help. If you don't understand, just ask, and I can answer any questions!!! :)
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What is the use of force to move an object over a distance?
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In physics, work is defined as the use of force to move an object. For work to be done, the force must be applied in the same direction that the object moves. Work is directly related to both the force applied to an object and the distance the object moves.                                                                                              <em>[I HOPE THIS HELPS* PLS MARK ME BRAINLIEST]</em>

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