Need answers asap! 1. holding the lever at which position will result in the greatest ima? 2. in the following lever system, what is the clockwise torque? a) 6nm b) 300nm c) 1,200nm d) 1,800nm 3. in the same lever system ( what is the counter-clockwise torque? a) 6nm b) 300nm c) 1,200nm d) 1,800nm 4. the ima of the following pulley system is a) 3 b) 4 c) 5 d) 6 e) 7

1. C.3

2. C.1,200NM

3. B.300NM

4. I think D.6

1.

IMA of the lever is given as the ratio of distance of applied force from the fulcrum and distance of load from fulcum.

when lever is held at position 3 , the distance of the applied force from fulrum is greatest for the same distance of load from the fulcrum. hence IMA is greatest at position 3

2.

Torque = Force x perpendicular distance

Torque = 200 x 6

Torque = 1200 Nm

Hence clockwise torque is 1200 Nm

hence correct choice is

C) 1200 Nm

4.

Torque = Force x perpendicular distance

Torque = 300 x 1

Torque = 300 Nm

Hence counter-clockwise torque is 300 Nm

hence correct choice is

B) 300 Nm

5.

IMA of the pulley system is 6

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what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.