PHYSICS 5A Lecture Notes - Lecture 9: Friction, Apparent Weight, Water Rocket
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Demos: water rocket, water in a cup with a hole on the bottom a. If you blow air (wind pressure) onto the sail of the boat, the boat would move forwards. If you take the sail off and replace it with a fan, the boat would also move forwards. If you put both the sail and the fan onto the boat together, the boat does not move. An object is in equilibrium when there is no net force acting on it it is not accelerating. A car with a mass of 1500 kg is being towed at a steady speed by a rope held at a 20 degree angle. A friction force of 320 n opposes the car"s motion. Analyze this in terms of the four forces acting on the car: weight, tension, normal, and friction. Note that tension needs to be broken up into components.
