We enjoyed observing and investigating forces in action today in our Science lesson.
Which forces were applied to the ball when it was thrown upwards? Which was the strongest force and how do you know? What about the forces on the ball on the way down?
Why is the book on the table not moving at all, even though the force of gravity is being applied to it? Which of Newton's laws does this relate to?
Friction
ReplyDeleteFriction is a force that acts in everyday life. This force occurs when two things meet and friction slows them down until it completely stops. Friction works in the opposite direction an object is moving. E.g If a car is moving backward friction is going forward. Friction always slows a moving object down. Air resistance is a type of friction.
Examples
-When you rub your hands together they create both friction and heat.
- Ice causes very little friction which makes you slip over very easily. This is an advantage for Ice Skating and Sledging.
-Friction also happens in the air but it is called air resistance. E.g When an airplane takes off and travels in the air, air molecules hit the plane, making it harder to move around. Vehicles that are streamlined move around easily.