Ablock and tackle is used to lift an automobile engine that weighs 1800 n. the person exerts a force of 300 n to lift the engine. how many ropes are supporting the engine? (remember that ama = force output/force input.)

6

Explanation:

The mechanical advantage of a machine is defined as the ratio between the output force and the input force:

In this problem, we have

is the output force

is the input force

So, the mechanical advantage is

Moreover, the mechanical advantage of a pulley system is also equal to the number of ropes supporting the load. In this case, the mechanical advantage is 6, therefore the pulley system must have 6 ropes.

a 2,000 calorie based diet.

magnets not strong enough

explanation: