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A common response from the student for the above question is: “I got 20km/h but it says it’s wrong! help i’m really confused”. The following two paragraphs will outline how I might attempt explain this id...

The diagram would have the following:

An arrow pointing upwards labeled v(y)

An arrow pointing to the right labeled v(x)

An arrow pointing in between those lines with a degree between...

ρ = (AR) / l

where:

ρ is the resistivity of the metal wire

A is the cross sectional area of the specimen wire

R is the electrical resistance of  a uniform metal wire

l i...

Aim of question: demonstrate that the speed of a dropped object is independent of its mass, and depends only on the height it is dropped from.

Solution: equate formulae for kinetic energy and for g...

We know momentum= mass (kg) X Velocity (m/s)

So we need to do these conversions:  1tonne=1000kg so 5 tonnes is 5x1000kg = 5000kg 

There are 1000km in a meter so 50x1000= 50000m/h to get this...