"When a person walks on a rough surface the frictional force exerted by the surface on the person is opposite to the direction of his motion". Is it true or false ?

"When a person walks on a rough surface the frictional force exerted b

1.	"When a person walks on a rough surface the frictional force exerted by the surface on the person is opposite to the direction of his motion". Is it true or false ?
Answer» SOLUTION :False. The motion is CAUSED by the REACTION FORCE due to friction.