Work can be very hard and we need a lot of energy for it sometimes. This is why we often use tools and machines. How can a lever make our work easier?Teacher
Welcome, students of 3.bg!
Gravity is a force. By the way, it is an action-at-a-distance force.
The inventor of a cat flap, Sir Isaak Newton, is famous for his theory of gravitation. How would you explain gravitation to a child of 10 to 12 years of age? The explanation should be simple.