A rescue worker pulls a heavy supply sled along a flat, horizontal snowy path.
State the relationship between work done, force, and distance moved in the direction of the force.
The rescue worker pulls with a constant horizontal force of 240 N240\text{ N}240 N and moves the sled 45 m45\text{ m}45 m. Calculate the work done moving the sled.
State the amount of energy transferred during this movement.
The rescue worker stops and holds a heavy mechanical lever horizontally to support a boulder.
Describe where the centre of gravity of the boulder is located with reference to the 720 N weight arrow.
State the equation linking moment, force, and perpendicular distance from the pivot.
Calculate the upward force FFF exerted by the rescue worker to hold the lever in this position.
