Question 3:

m Question 3 0/ 8.33 pts Three ants are pulling on a piece of bread at the picnic. The first ant pulls with 0.10 N of force at 45 degrees North of East, the second at pulls with 0.25 N of force at 45 degrees West of North. How hard must the third ant pull in order to reach equilibrium with the other ants? .352 N Incorrect Question 4 0 / 8.33 pts Which one(s) of these force diagrams depict an object moving to the right with constant speed? Select two answers. 25 N 20 N 20 N 25 N O 25 N 25 N 25 N 20 N 25 N 25 N 20 NQuestion 7 0 I 8'33 \"ts A 13 N sign is hanging from two ropes as shown. Rope B makes and angle of 30 degrees with the horizontal. What is the tension in rope B? Report your answer as a positive number in newtons. / / / / / / / 3 30C mg 42 Try again. Rope B must support all the weight because rope A doesn't have a vertical component. The vertical component of tension B would be equal to the downward force of gravity. A mother exerts a force F on her child in a moving elevator. (a) Choose the correct situation or situations for each free-body diagram of the forces acting on the child. (Select all that apply.) "Flt naL "1E C] elevator moves up at a constant speed C] elevator moves down at a constant speed C] elevator moves up with increasing speed C] elevator moves down with increasing speed C] elevator moves up with decreasing speed C] elevator moves down with decreasing speed 3' "I'll mi 1! :3 mg elevator moves up at a constant speed C] elevator moves down at a constant speed l_J elevator moves up with increasing speed [:1 elevator moves down with increasing speed l_J elevator moves up with decreasing speed C] elevator moves down with decreasing speed X a mg elevator moves up at a constant speed U elevator moves down at a constant speed U elevator moves up with increasing speed V elevator moves down with increasing speed O elevator moves up with decreasing speed elevator moves down with decreasing speed XIf the child has a mass of 19.4 kg, calculate the magnitude of the force in newtons the mother exerts on the child under the following conditions. (b) The elevator accelerates upward at [1.922 mfsz. 1?.88 3; Refer to your answer to part (a). N Calculate the ratio of this force to the weight of the child. force = 0.094 x child's weight Check the values you have used for the force and weight. (c) The elevator moves upward at a constant speed. 190.12 N Calculate the ratio of this force to the weight of the child. force ./ child's weight 2 (d) The upward bound elevator decelerates at 2.05 m/sz. 739.77 3; Refer to your answer to part (a). N Calculate the ratio of this force to the weight of the child. force 2 D 209 X child's weight Check the values you have used for the force and weight