Two french people are flying from France to Denmark by plane. Their friends who accompanied them stay at the airport.
1-a- In which referential must we be situated to have a man in the plane who is in mouvment ?
b- In which referential must we be situated to have a man in the plane who is immobile ?
2-a- In which referential must we be situated to have a man in the airport who is in mouvment ?
b- In which referential must we be situated to have a man in the airport who is immobile ?
The plane is heading towards Denmark at 900 km/h. A man in the airport is running at 12 km/h in the opposite direction.
3- What is the speed of the plane by report of the man ?
Recent Comments