Which machine has the greatest mechanical efficiency a block and tackle or a lever?

No. A pulley is a simple machine. A block and tackle is a "complex" machine, because it's made of several simple machines.

The mechanical advantage is that the force applied increases but that is compensated by the fact that the rope or chain needs to be moved through a greater distance.

its a simple machine as in easy puller

An electric motor is not a simple machine, because it uses electric energy, which is not mechanical energy, which powers simple machines.

Equal to the number of cords supporting the weight.

A block and tackle. an ellevator, a winch,

Block and tackle refers to a rope threaded through a series of pulleys to provide mechanical advantage, and it is used to lift heavy objects,

I know for a fact that the answer is a pulley.

no but a first class lever is

It has to be Trevor Pryce.

because he was the greatest Defensive Tackle of all time

a lever a winch a block and tackle

Of a single pulley wheel, only that it changes the direction of the force ie: from overhead. > On a block and tackle system, 2 or more pulley wheels are used in a certain way to produce mechanical advantage. The simplest type of block and tackle offers a mechanical advantage of 2

look in your ducking textbook

fixed pulley,moveable pulley and block-and tackle pulley

A block and tackle consists of a system of pulleys with a rope and hook. It is a simple machine which lets you lift a heavy weight more easily. We say it gives you a mechanical advantage,or that it is a force multiplier because it lets you trade a large distance by which you pull the rope using a small effort for a small distance lifting the heavy weight. An example is an engine hoist.

Greatest cover corner ever. Excellent returner. Scared to tackle

The block and tackle is still used in the manner it has always been used, to gain a mechanical advantage in lifting or pulling objects. It is used extensively aboard ships today. I used them in the Navy. I have also used the block and tackle on construction jobs when rigging heavy loads to move them. The block and tackle is very handy when there is no source of electric power available and in remote locations.

John Randle 11.5 The greatest Defensive Tackle of all time (After Alan Page)

A football does not tackle at all, the teams tackle.

because they gone knock you out with a tackle

No it doesn't come with the tackle but it has compartments for it.

No, the costume that you wear has no effect on the mechanical advantage. The word is "ropes" and the answer is "yes", it equals the number of ropes carrying the weight. Easily proved by working out the tension in the rope.

There are many tackle shops in Fort Lauderdale, Florida. Such tackle shops include LMR Custom Rods & Tackle, T & R Tackle Shop, and Competition Bait Tackle.

US patent 4 was awarded to Thomas Blanchard in 1836, for a machine to round the ends of tackle blocks.