Design

Experimenting with pulleys.

Our materials were a green bucket, a pulley, a double pulley and a piece of wire. We had to compare what was easier, pulley or no pulley. Pulley was better because we didn’t need as much people pulling the rope and also it reduced rope-burn greatly. Without the pulley we had 1 more person pulling the rope and someone didn’t have to stop the rope when we wanted to stop the bucket falling. Also, when the pulley was gone we dropped our bucket and it cracked. Our challenges were co-operation, pulley stuck and noise. Co-operation was fixed by assigning jobs to each other that we wanted. Noise was fixed by talking one at a time. Pulley stuck was fixed by placing it straight. It was very fun and exciting. It was nice working with different people.

OVERALL POINTS STATED

People Involved: Aimee, Mikayla, Callan, Harry Sadler & Harry Santalucia, Phoebe, Reuben Harrison and I

Successes: 19

Fails: (6) 1. Pulley (3 times) 2. Chaos 3. Loss of grip and it cracking

Location: above Minerva board near the gum tree on balcony Materials: 10m string, Double-pulley, single pulley and wire

Problems: Loudness issues, pulley stuck and rope burn.

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2 thoughts on “Design

  1. Sounds like a lot of fun! You said that one “pulley was better because we didn’t need as much people pulling the rope and also it reduced rope-burn greatly”. What scientific principles can you conclude from this?

    1. The pulley reduces the friction and the force needed to lift and pull a heavy object, such as a full bucket of water.

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