2. [-12.85 Points] DETAILS OSCOLPHYSZO16 5.1.P.004. MY NOTES ASK YOUR TEACHER Suppose you have a 124-kg wooden crate resting on a wood floor. (pk = 0.3 and \"s = 0.5) (a) What maximum force (in N) can you exert horizontally on the crate without moving it? [:N (b) If you continue to exert this force (in m/sz) once the crate starts to slip, what will the magnitude of its acceleration then be? m/s2 3. [-I2.85 Points] DETAILS OSCOLPHYSZO16 5.1.P.014. MY NOTES ASK YOUR TEACHER Calculate the maximum acceleration (in m/sz) of a car that is heading up a 8 slope (one that makes an angle of 8 with the horizontal) under the following road conditions. Assume that only half the weight of the car is supported by the two drive wheels and that the static coefficient of friction is involved--that is, the tires are not allowed to slip during the acceleration. (a) on dry concrete 2 H m/s (b) on wet concrete m/s2 H (c) on ice, assuming that [.15 = 0.100, the same as for shoes on ice 2 H m/s 4. [-I2.85 Points] DETAILS OSCOLPHYSZO16 5.1.P.017. MY NOTES ' ASK YOUR TEACHER Consider the 47.0 kg mountain climber in the gure. (a) Find the tension in the rope (in N) and the force that the mountain climber must exert with her feet (in N) on the vertical rock face to remain stationary. Assume that the force is exerted parallel to her legs. Also, assume negligible force exerted by her arms. tension in rope |:l force on feet I:] N (b) What is the minimum coefficient of friction between her shoes and the cliff? |:l 5. [I2.85 Points] DETAILS OSCOLPHYSZO16 5.1.WA.003. MY NOTES ASK YOUR TEACHER The three diagrams below show a block of mass m being pulled or pushed at constant acceleration 5)( along a table with a force P. The coefficient of kinetic friction is k. What is the friction force in each case? Give your answer in terms of the pushing force P, ax, m, and the angle 6. (i) (ii) (iii) case (i) fk = case (ii) fk DUB case (iii) fk = Calculate the maximum acceleration (in m/s) of a car with four wheel drive that is heading up a 80 slope (one that makes an angle of 80 with the horizontal) under the following road conditions. Assume that the static coefficient of friction is involved-that is, the tires are not allowed to slip during the acceleration. (a) on dry concrete m/s 2 (b) on wet concrete m/s2 (c) on ice, assuming that US = 0.100, the same as for shoes on ice m/s2 +6. [l2.85 Points] DETAILS OSCOLPHYSZO16 5.1.XP.001. MY NOTES ASK YOUR TEACHER Calculate the maximum acceleration (in m/sz) of a car with four wheel drive that is heading up a 8 slope (one that makes an angle of 8 with the horizontal) under the following road conditions. Assume that the static coefficient of friction is involvedthat is, the tires are not allowed to slip during the acceleration. (a) on dry concrete Ewe (b) on wet concrete :1 we (c) on ice, assuming that us = 0.100, the same as for shoes on ice :m/sz 1. [-12.85 Points] DETAILS OSCOLPHYSZO16 5.1.P.001. MY NOTES ASK YOUR TEACHER A physics major is cooking breakfast when he notices that the frictional force between the steel spatula and the Oiled Steel frying pan is only 0.150 N. Knowing the coefficient of kinetic friction between the two materials (0.03), he quickly calculates the normal force. What is it (in N)? |:lN 1