9. Four pulley system is shown in the diagram. If its efficiency
is 80%, calculate by using the formula:
i.
the effort applied to lift the load
ii.
output work when the load is lifted
up to 6 metres
input work
iv.
mechanical advantage
Effort
botool
1800 N​

Jason is a body builder. despite being more fit, he weighs more than his brother ryan, who is the same height. which is a possible reason? a. jason has more muscle mass than ryan does. b. jason has more body fat than ryan does. c. jason has more muscle mass and body fat than ryan does d. jason has less body fat than ryan does.

Astone is thrown into a pond. what happens to the amplitude of the resulting waves as they get farther from the point where the stone hit the water? explain.

Which situation will have the highest resistance? a.long wire and high temperatureb.short wire and high temperaturec.long wire and cold temperaturedshort wire and low temperature