Physics

Double-sided lever

Principle

On a double-sided lever the students should verify the law "force × force arm = load × load arm" and be able to present it as a formula.

In a supplementary problem the term moment of rotation can be treated and the l ...

One-sided lever

Principle

In Experiment ME 3.2 (Double-sided lever) the students became familiar with the law of the lever and its representation in the form "Sum of all moments of rotation equals zero". In this experiment they should investigate the one-sided lever in th ...

Force and displacement on a fixed pulley

Principle

The students should deflect a force with a fixed pulley and determine whether the forces and distances are changed by doing this.

Further, through experiment and calculation they should determine whether the products of load × load dist ...

Force and displacement on a free pulley

Principle

1. The students should determine the forces which occur on both supporting lines of a movable pulley when it is loaded with various masses.
2. Further, they should change the point of impact of the force (the force distance) and examine t ...

Block and tackle formed from a free and a fixed pulley

Principle

The students should recognize on a simple block and tackle that the force required to lift a specific load can be reduced by half compared with the weight (force) by using an arrangement of 2 pulleys. However, a longer distance must be covered. By com ...

Block and tackle with four pulleys

Principle

Using a block and tackle as an example, the students should observe that the force, which is necessary to lift a given load, decreases in direct correlation with the number of pulleys.

1. They should determine how much larger t ...

Force and displacement on a step wheel

Principle

1. The students should measure the forces which maintain equilibrium with different load masses on a step wheel.
2. They should measure the force and the length of the load arms of a step wheel, and calculate the products load ×  ...

Gear mechanisms and belt drives

Principle

On both a single-stage gear and belt drive, the students should determine the sense of rotation of the driven and the driving wheel as well as the drive ratios. The students should compare the ratios obtained experimentally with the ratios of the numb ...

Work on an inclined plane

Principle

The students should know that in physics, work is defined as the product of force × distance.

In this experiment they should learn that the work is independent of the path by which the end point is reached from the starting point.< ...

Potential energy and tension energy

Principle

By applying the laws of energy the students should determine the elastic energy of a helical spring as a function of its extension: W_H = W_S.

Through the evaluation of the measuring results in ...

Power

Principle

In Experiment ME 3.10 (mechanical work on an inclined plane), the students were introduced to the definition of work.

Now they should investigate the influence of time on power in a simple experiment. To facilitate comparison, work is held co ...

Joined vessels

Principle

Using a flexible U-tube consisting of two glass bells and a piece of tubing, the students should investigate how the water level in the two sides of the U-tube behave when the relative positions of the two tubes are changed.

Task

Hydrostatic pressure

Principle

The students should determine the directional independence of hydrostatic pressure (termed as top, lateral and bottom pressure) with the aid of 3 hydrostatic pressure probes.

Additionally, they should measure the hydrostatic pressure as a fu ...

Buoyancy and floating

Principle

The students should determine whether or not various objects float in water. They should then investigate whether the volume of an object or its shape affect its buoyancy.

Task

When does an object float?

Archimedes' principle

Principle

The students should determine the weight (force) of an object in air and then in water. From the difference they should calculate the buoyancy F_b. 

In a second experiment, the students should determine the mass ...