Levers Questions

A load of 300 N is held with a force of 1200 N. If the force is acting at a point 25 cm away from the fulcrum, what is the length of the lever in metres?

Which of the following is an example of first class lever?

A third class lever has a mechanical advantage

Which statement about levers is CORRECT?

Which one of the following are correct for levers?

1. If there is a gain in force, there is a loss in distance.
2. The mechanical advantage is the ratio of the load to the force.
3. In simple machines, there is a gain in work.

What kind of lever is the hydraulic crane shown in the figure?

Which diagram below shows the working principle of pliers?

Which of the following is an example of second-class lever?

Which equation is correct for the lever shown in the figure?

Which of the following is NOT an example of levers?

What is the minimum force (in N) needed to lift the 600 N object, if x=3 m and y=2 m?

Therefore, the correct answer is D.

The long side of a crowbar (up to the turning point) has a length of 0.80 m. it is used to pull out a nail from a board. The nail is 5 cm away from the turning point. Calculate the force to be used if the nail can take a maximum force of 3000 N.

What is F₁ / F₂ if the bars and loads in the two figures are identical?

Which diagram below shows the working principle of clothes pegs?

 Which of the following principles is NOT related to the equation of levers?

In order to lift a load using a 2.0 m bar as in the figure, Teddy exerts a 320 N force. The turning point is located 80 cm away from the left end of the bar, on which the load is placed. What is the mass of object (in kilograms) to be lifted up if the force is exerted on the other side of the bar? (Take the gravitational field strength 10 N/kg approximately)

Which of the following levers has a mechanical advantage less than 1?

How many levers are there in the figure?

A wheelbarrow weighs 20 kg when empty. A 600 N load is carried using it. The load is concentrated at a point which horizontally is 50 cm away from the wheel. The wheelbarrow, which is 2m long, has also its center of mass at this point. How much easier do we lift the load instead of carrying it on shoulders? (Take the gravity equal to 10 m/s2 if needed)

A moveable pulley is a simple machine, which halves the force necessary to lift a load, while a fix pulley can only change the direction of force. It cannot change the magnitude of force. In this regard, calculate the mechanical advantage of the system show in the figure below.