please do all the questions iD webassign.net Netflix Netflix PHYS 121 HW 4 9. -3
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please do all the questions
iD webassign.net Netflix Netflix PHYS 121 HW 4 9. -3 points SerCP10 4.P.012. My Notes Ask Your Teacher Two forces are applied to a car in an effort to move it, as shown in the figure below. (Let F1 directions.) 405 N and F2354 N. Assume up and to the right are in the positive 10° l 30° (a) What is the resultant vector of these two forces? magnitude direction to the right of the forward direction (b) If the car has a mass of 3,000 kg, what acceleration does it have? Ignore friction. m/s Need Help? Read It 10. 1 points SerCP10 4.P013. My Notes Ask Your Teacher A 914-kg car starts from rest on a horizontal roadway and accelerates eastward for 5.00 s when it reaches a speed of 30.0 m/s. What is the average force exerted on the car during this time? kN eastward Need Help?Read ItExplanation / Answer
9a) Fx =354 sin 30 degree - 405* sin 10 degree
= 106.7 N
Fy = 354 cos 30 degree +405*cos 10 degree
= 705.4 N
Resultant = sqrt(106.7^2 +705.4^2)
= 713.4 N answer
Direction = arctan(106.7/705.4) = 8.67 degree answer
B) acceleration a = F/m =713.4/3000 = 0.2378 m/s^2
10) F = ma = 914*30/5 = 5484 N
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