Bridges
What are the FOUR bridges that we have covered in class?
Arch, Truss, Suspension, Beam
What is Inclined plane, Lever, Wedge, Wheel/Axle, Pulley and Screw
How many classes of levers are there?
What is THREE
If the Mechanical Advantage is 4 and the load is 40N. Calculate the force needed
What is 10N
what is a wedge?
A back to back inclined plane: May hold things together or pull them apart
An arch bridge has
What is an arch to transfer the load to supporters
An inclined plane has
What is a flat slanted surface
A second class lever is when the
load is between the fulcrum and the effort
If the length of the effort arm is 120 cm and the length if the load arm is 40 cm. What is the mechanical advantage?
What is 3
If the length of the effort arm is 160 cm and the length if the load arm is 40 cm. What is the mechanical advantage?
What is 4
A Truss bridge has
What is a beam composed of connected steel triangle
A pulley is
What is a wheel with a rope wrapped around it
A seesaw is an example of which type of lever
First class lever
If the Mechanical Advantage is 5 and the load is 35N. Calculate the force needed
What is 7N
What is a wheel and Axle
A wheel attached to an axle
An suspension bridge has
What is a beam hung from cables
A Lever is
What is an object used with a fulcrum
A third class lever is when
when the effort is between the fulcrum and the load
If the length of the effort arm is 200 cm and the length of the load arm is 20 cm. What is the mechanical advantage?
What is 10
If the length of the effort arm is 350 cm and the length if the load arm is 50 cm. The weight of the load is 56N What is the mechanical advantage? What is the force needed.
MA= 7
Force needed: 8N
A beam bridge has
What is a simple beam to support a load crossing a gap
A screw is
What is a shaft with a spiral shaped groove on its surface
A first class lever is when
the fulcrum is between the load and the effort
If the length of the effort arm is 400 cm and the length if the load arm is 50 cm. The weight of the load is 48N What is the mechanical advantage? What is the force needed.
What is 8
What is 6N
A ramp is an example of which simple machine
What is an inclined plane