physics science

Explain the difference between the terms speed and velocity

Speed is just how fast something is moving (like 60 km/h), with no direction.

Velocity is how fast something is moving plus the direction it is going (like 60 km/h north).

If a person is chased by a hippopotamus, running in a path with sharp curves would work to their advantage. Explain using Newton’s laws.

A hippo's large mass creates high inertia, making it resistant to changes in motion and difficult to turn quickly (Newton's 1st law). A human's much lower mass and inertia allow for fast, sharp turns to escape.

name and explain all of newtons laws.

First Law: An object will stay still or keep moving in a constant speed unless a force pushes or pulls it.

Second Law: The heavier an object is, the more force it takes to speed it up (F=mxa)

Third Law: For every action, there is an equal and opposite reaction

what is independent, dependant and controlled variable?

change

measure

keep the same for fair test

formula triangle for force, mass and acceleration

formula triangle for distance, speed, time

how to convert km/h to m/s

how to convert hours, minutes, seconds

how to convert km, m, cm, mm

how to convert tonne, kg, g, mg