Question

Give two examples to explain that motion is relative

Answer 1

For example, you are in a car and it goes with the velocity of 50 m/s to the east, then a truck passes you with a velocity of 60m/s to the east. When the truck is next to the car you feel that as you go backward to the west or when the two jeep have same velocity when you look another jeep you feel you do not move. On the contrary, consider the below examples, if you look at the stationary objects at the ground when you travel, then you feel yourself travel with the velocity of the jeep. All these are the result of relative motion. Velocity of the moving objects with respect to other moving or stationary object is called “relative velocity” and this motion is called “relative motion”. Reference point is too important in physics. We do all calculations according to the reference points. For instance, we observe the plane flying in the air, velocity of that plane with respect to us is the sum of the velocities of plane and the wind. However, the same plane has different velocity with respect to the flying other plane. To sum up, we determine the directions and quantities of velocity of the objects with respect to a chosen reference point.