Lever experiment. Simple machines
Answers are for parents and teachers.
1
With a movable pulley, ideal force to lift a 360 N load, in N?
180
2
An inclined plane is 10 m long, 2 m high. Ideal force for a 600 N load, in N?
120
3
Windlass R = 50 cm, r = 10 cm. A 100 N force lifts how many N of load (ideal)?
500
4
Find three simple machines at home (e.g. screw, wedge, lever) and write what they are for.
Sample: wood screw — fastening; knife (wedge) — cutting; scissors (lever) — cutting.
5
Why is a ramp convenient for wheelchairs?
The force needed is smaller because the path is longer and gentler.