Watch the video in class, or follow this link and find examples of the following concepts from the movie:
1. Net force- 2 examples
2. Friction- 3 examples
3. Gravity- 2 examples
4. Newton’s 1st law: Inertia- 4 examples
5. Newton’s 2nd law: f=ma- 4 examples
6. Newton’s 3rd law: action/ reaction- 4 examples
1. Net force:
- Example 1: When a car accelerates, the net force acting on it is in the direction of the acceleration.
- Example 2: When a person pushes a heavy object across the floor, the net force is in the direction of the push.
2. Friction:
- Example 1: When a person slides a box across the floor, friction opposes the motion of the box.
- Example 2: When a car brakes, friction between the tires and the road slows down the car.
- Example 3: When a person walks on a slippery surface, friction helps to prevent slipping.
3. Gravity:
- Example 1: When an object is dropped, gravity pulls it downwards towards the ground.
- Example 2: When a ball is thrown in the air, gravity eventually causes it to fall back down.
4. Newton’s 1st law: Inertia:
- Example 1: A stationary book remains at rest until a force is applied to it.
- Example 2: A moving car continues at a constant velocity unless acted upon by an external force.
- Example 3: A person on a swing will keep swinging back and forth unless a force (like friction or air resistance) stops them.
- Example 4: A hockey puck on ice will keep sliding in a straight line unless a force (like friction) changes its motion.
5. Newton’s 2nd law: f=ma:
- Example 1: When a person pushes a heavy box, the acceleration of the box is determined by the force applied and the mass of the box.
- Example 2: When a car accelerates, the force applied by the engine results in the car's acceleration.
- Example 3: A rocket launching into space experiences a large force due to the engines, leading to a significant acceleration.
- Example 4: When a person jumps into a pool, their acceleration is determined by the force of the jump and their mass.
6. Newton’s 3rd law: action/reaction:
- Example 1: When a person jumps off a diving board, their push off the board (action) results in them moving upwards (reaction).
- Example 2: When a person walks, the action of pushing against the ground with their foot results in a reaction force that propels them forward.
- Example 3: When a rocket launches, the action of the engines pushing down against the ground creates a reaction force that propels the rocket upwards.
- Example 4: When a balloon is inflated and released, the action of the escaping air propels the balloon forward as a reaction.