Soda Bottle - Post Lab

• How much force is necessary to dislodge the stopper from the bottle?

The force that the stopper exerts on the bottle and the force the bottle exerts on the stopper do not cancel out. These forces act on the different object, despite that they have equal magnitude. So the force is necessary to dislodge the stopper from the bottle depends on the mass of the stopper, and perhaps mass of the bottle.


Question:

1. If one object pushes a force on another object, it will be pushed back with an equal but opposite magnitude.
2. As the gun is fired, it applies a force to launch the bullet. The bullet will push a force back to the gun, causing the gun recoils
3. The force that a ball applies to the paddle as well as the paddle applies to a ball is constant. The paddle has larger mass than the ball, so the paddle will accelerates slower than the ball. It will be hard to observe the motion of the paddle as being pushed back.

Real-world situations:

1. In launching the rocket to the space, people at NASA apply Newton's Third Law. At lift-off, hot burning gas is pushed downwards by the rocket motors. The hot gas pushes back on the rocket in an upwards direction. When this upwards push exceeds the weight of the rocket, the forces acting on the rocket are unbalanced and the rocket accelerates upwards.
2. As you are driving your car on the road. The car has to exert a force against the road. And the road has to exert the same force on your car. Otherwise, the car wouldn't be accelerating.
3. The hunter shoots the bullet from a gun. As the bullet flying out of the gun, it causes a recoil in the gun, exerting a force that pushes back the hunter. That is why he feels his body being pushed backwards.