What is the usefulness of equation of motion in our practical life

Have you ever pushed a supermarket trolley? Did you notice
the fuller it gets the harder it is to push? This is Newtons 1st law of motion in
action: F = ma. F = force (how hard you have to push), m = mass (how many groceries are
in the trolley), a = acceleration (how quick you can get it moving from standstill). So,
if you want to get your trolley moving to a reasonable speed, the more stuff you have,
the harder you have to push.