John is sitting inside a stationary train at a train station. Through the window, he observes only the windows of a train on the adjacent platform. Suddenly, the windows of the adjacent train begin to move. Therefore, John can be sure that it's the adjacent train that is moving.
A driver drives a car in a compact column. Therefore, the car moves relative to neighboring cars.
A passenger gets up from the seat of a moving aircraft and walks towards the cockpit. Therefore, the passenger is moving relative to the plane and relative to the observer on Earth.
Jane stands on the road. A bus full of passengers passes by. Therefore, the passengers are at rest in relation to the bus, and in relation to Jane, they are moving.
. Calculate the speed at which the Earth travels around the Sun.
. Car Y has a constant acceleration of 
. At the instant shown, car X is a distance 
ahead of car Y. Car Y is travelling at a speed of 
.
. What is the distance 
increases its velocity from 
to 
in time 
. Which expression would not give a correct value for the body’s displacement during time 
