Determine whether the statements are correct:
Frictional force acts in the direction of the body's motion.
Friction is greater if the body mass is greater and if the contact surface between the body and the ground is rougher.
Friction is greater at higher body speeds.
Friction is independent of the size of the contact area between the body and the ground.
Friction is low during skating because the ice is smooth.
When a boatman paddles on water, the motion is hindered by friction between the boat and the water.
