Respuesta :
Speed is not a vector so horizontal speed does not sighify anything. If u meant velocity it vill be same as the initial velocity in horizontal direction
Answer: Horizontal speed=5m/s
Explanation:
Speed= distance / time
Speed of object = 5m/s
Distance = 5m/s/1second= 5m
Speed = 5m× 1sec=5m/s
Horizontal speed after 1 second is 5m/s