# How do you solve this physical question

## Instructions for solving physical problems

### Step sequence for solving technical tasks:

Factual problems in physics (as in mathematics) are solved in 4 steps:

**given:**- Acquisition of all important given quantities.- Read the task carefully and mark all the important parameters with a marker.
- Enter sizes with formula symbols, value and unit under given.

**searched:**- Detecting the physical quantity you are looking for.- Mark the size you are looking for with a marker in a different color.
- Enter sizes with formula symbols, value and unit under searched.

**Solution:**- Calculate the desired physical quantity with the help of the correct formula- Note it must always be there: FORMULA - FORMULA inserted - RESULT with unit
- Find the correct formula from the table of contents with the help of the table of contents.
- If necessary, convert sizes into other units.
- Insert the given values with units in the formula.
- Calculate with a calculator.
- Enter the result with the correct unit.

**Answer sentence:**- Write an answer phrase related to the question- Use the result to answer the question asked in the exercise.

**Example 1 - we work together ...**

Susi pushes a shopping trolley through a supermarket with a force of 220 N. It covers a distance of 80 m. Calculate the mechanical work (pushing work) that Susi did in the supermarket.

**For the first example:**

Here is the solution again for example 1 ->

**Example 2 - we work together again ...**

A crane lifts a pallet onto a ship in 1.5 minutes. It does 90 kJ of mechanical work. How big is the mechanical work done by the crane.

**For the second example:**

**Example 3 - Try it yourself ...**

A conveyor belt in the airport transports suitcases. A suitcase covers a distance of 180 meters. This takes him 2 minutes. Calculate the speed of the conveyor belt in meters per second. (Note - you still have to convert the minutes into seconds.

Here are the solutions for example 2 and 3 ->

In grade 7, the technical tasks are usually more complex. However, they are solved using the same sequence of steps. The complex task is broken down into sub-tasks and then solved in 4 work steps. Here is an example to practice with, of course with a solution

**Example 4 - a complex task with a lot of explanation**

A crane lifts a box with a mass of 150 kg to a height of 12 m in 30 s.

- Calculate the mechanical work (lifting work) that the crane does. (Note that the mass is given.)
- Calculate the mechanical power that the crane performed.

Here is the worksheet to practice with ->

Here is the solution to the complex task ->

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