PHYS114 Study Guide - Midterm Guide: The Crate, Friction, European Route E6

• School: University of Alberta
• Department: Physics
• Course: PHYS114
• Professor: Al Meldrum

Document Summary

Time: 50 minutes; calculators & formulae provided at the end = only aid; total = 20 points. 1)[5] three crates rest on a frictionless, horizontal ice surface as shown with m1 = 80 kg, and m3 = 110 kg. A horizontal force of f = 1150 n is applied to block 3 (which is on the right), and the acceleration of all three blocks is found to be a = 3. 4 m/s2. 1: [5] a car is speeding on a highway at v = 130 km/h under foggy conditions. Suddenly, the driver notices that at a distance of d = 250 m in front the tra c has come to a complete stop. The maximum braking acceleration his car can sustain corresponds to a = 0. 8g (where g is the free-fall acceleration at the surface of the earth). Calculate whether the driver will manage without hitting the stopped cars.