What quantity does this graph of a train's motion represent? Describe the train's motion
between 3 and 5 minutes. Explain whether this graph represents a vector or scalar quantity.
Why?
Train's Distance v. Timea
Distance (km)

This graph shows the distance moved by the train with respect to time

Between t = 3 to t = 5 the train is at rest

Since this graph shows the distance covered by the train so it is a scalar quantity

Explanation:

Here from the graph we can see the distance covered by the train with respect to time

So here from the slope of this graph we can find the speed of the train

Also from t = 3 to t = 5 we can see that slope of the graph is zero

So here n this time interval there is no motion or it is at rest

Now since we know that this is distance vs time graph so it is a scalar quantity showing in this graph

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force