Give examples to show that friction is both a friend and a foe.

Explanation:

Wind resistance is a kind of friction we usually try to minimize.  It makes our cars and planes run less efficiently.  At the same time though, we need friction between our tires and the road to move, as well as friction in our brakes to stop.  We wouldn't be able to walk without friction, or start a campfire by rubbing sticks together.

the answer is 46 mls because when you add the speed per second it increses the speed

here we know that ball will drop down by total distance 3.2 m

so here we know that

now using kinematics

now in the same time it will cover horizontal distance of 0.75 m

so speed of the ball will be