Question

E: + [12] Two friends are trying to pull a car out of a ditch. They apply forces, measured in pounds of F = 200i +350j+100k and F, = 250i +300j+150k , respectively, to the car, but it does not move. Find the third force F3, due to the mud and ground, acting on the car and preventing it from moving. 10

Answer 1

Answer:

• - 450 i - 650 j - 250 k

Solution:

Fi F Step 1) - = Force due to mud & ground. As the car in equilibrium, + E [sum of forces=o] Step 2) Given: F = 200 î +350 ĵ +10o Ê E = 250 +300 ĵ +150 O Step 3) so, [200Î +350 ġ +10o ß]+[250€+300ſ +150 ++*=o * F = -(200+250)? -(350+300)-200+150) E = -450 î - 650 ĵ - 250 Ê ***