Foundations of Physical Science

Foundations of Physical Science PowerPoint PPT Presentation


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Foundations of Physical Science

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1. Foundations of Physical Science Workshop: Ropes & Pulleys - Work

2. Ropes & Pulleys - Work CPO Science

3. Key Questions What happens when you multiply forces in machines? What is work and how is work measured? How are force and distance related in machines? The key questions challenge students to really look at something scientifically. They can develop ideas about what they observe and then test hypothesis by using the equipment first hand. The key questions challenge students to really look at something scientifically. They can develop ideas about what they observe and then test hypothesis by using the equipment first hand.

4. Overview Calculate the amount of work done by a simple machine – ropes and pulleys Use units of joules to measure the amount of work done Analyze the effects of changing force or distance in a simple machine These are the main points of the Investigation that we will explore and focus on. These are the main points of the Investigation that we will explore and focus on.

5. Simple Machines Include: rope and pulley wheel and axle systems gears ramps levers screws Review From Previous Pulley Inv. Simple machines transform input forces into output forces. The concept of mechanical advantage is the measure of how much the forces are increased or possibly decreased. When we use simple machines, we apply an input force to accomplish some task, and the machine converts it into an output force that makes the task easier, or provides us with a more convenient option to accomplish the task. For instance, we can climb a ladder, or we can go up stairs( a kind of ramp ) to reach to top of a tower. Either way, we wind up the same height off the ground. However, the stairs allow us an easier option than the ladder to reach to the top. Review From Previous Pulley Inv. Simple machines transform input forces into output forces. The concept of mechanical advantage is the measure of how much the forces are increased or possibly decreased. When we use simple machines, we apply an input force to accomplish some task, and the machine converts it into an output force that makes the task easier, or provides us with a more convenient option to accomplish the task. For instance, we can climb a ladder, or we can go up stairs( a kind of ramp ) to reach to top of a tower. Either way, we wind up the same height off the ground. However, the stairs allow us an easier option than the ladder to reach to the top.

6. Mechanical Advantage For the Lever Two ways to calculate mechanical advantage

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