GIVE REASON -
1) MECHANICAL ADVANTAGE OF SECOND CLASS LEVER IS ALWAYS GREATER THAN ONE.
2)IN A CLASS 3 LEVER ,THERE IS ALWAYS A GAIN IN SPEED.
3) WHEELS ARE USED IN VEHICLES.
4) INCLINED PLANE MAKES OUR TASK EASIER .
Answers
Answer:
It is highly helpful to know that the mechanical advantage 1.(M.A.) of Class two levers is usually greater than one. It is because the overall length of the Effort Arm is higher than the overall length of Load Arm. It is easily known by MA is effort arm/load arm
2.Third class levers are different from first and second class levers because instead of force multipliers, they are speed multipliers. ... Because a larger force is applied by the effort, the load travels a further distance. Since the load travels a further distance, its speed is also
3.Wheels reduce friction. Instead of simply sliding over the ground, the wheels dig in and rotate, turning around sturdy rods called axles.
4.An inclined plane makes it easier to raise something heavy, like a rock. ... Because work is force multiplied by distance, the amount of work remains mostly the same, In a steep ramp, it will be harder to push the rock/load but you won't need to push it as far.