Unbalanced forces cause a change in motion, speed, and/or direction. When two forces act in the same direction on an object, the net force is equal to the sum of the two forces.

The greater the force that is applied to an object of a given mass, the more the object will accelerate. For example, doubling the force on the object doubles its acceleration.

Then what do forces do to an object? They CHANGE the speed. It would be better to say a greater force causes a greater CHANGE in velocity for an object. In that particular case, a greater gravitational force means that the planet must have a circular orbit with a greater speed.

a force applied on an object may change its speed. If the force applied on the object is in the direction of its motion, the speed of the object increases. If the force is applied in the direction opposite to the direction of motion, then it results in a decrease in the speed of the object.

In science, a push or a pull on an object is called a force. A force can change the shape and size of an object.

We can tell that an object can be pressed by the following:

1. Holding the object to see if its soft.
2. Look at the object to see if its safe.

Answer. The first law states that a body at rest will stay at rest until a net external force acts upon it and that a body in motion will remain in motion at a constant velocity until acted on by a net external force.

The speed and direction of motion can be changed by applying force on an object and thus a force can bring a change in the state of motion of an object.

The overall force on an object, called the net force, is found by combining all of the forces acting on the object. The size of the net force determines whether the object’s motion changes. The direction of the net force determines the direction of the object’s motion.

The direction of force on a current carrying conductor placed in a magnetic field is given by Fleming’s Left Hand Rule. The forefinger, the middle finger and the thumb of the left hand are stretched in mutually perpendicular directions.

Inertia is a force which keeps stationary objects at rest and moving objects in motion at constant velocity. Inertia is a force which brings all objects to a rest position. All objects have inertia. Fast-moving objects have more inertia than slow-moving objects.

gravity

Mount Nevado Huascarán

Gravitational Force

Gravity

the strong nuclear force

The term long range force means that at infinite distance the force never actually becomes zero. Forces like normal force, frictional force need contact in order to exist but forces like gravitational force and electrostatic force do not need any physical contact to come into existence.

As its name suggests, the strong force is the strongest—it’s 100 times stronger than the electromagnetic force (which binds electrons into atoms), 10,000 times stronger than the weak force (which governs radioactive decay), and a hundred million million million million million million (1039) times stronger than gravity …

In the case of electromagnetism, the particles are photons, which have no mass; the electromagnetic force extends to an infinite distance. Very heavy particles called pions mediate the strong force, however, so its range is extremely short.

strong nuclear force

The strong nuclear force holds most ordinary matter together because it confines quarks into hadron particles such as the proton and neutron. In addition, the strong force binds these neutrons and protons to create atomic nuclei.

If the strong nuclear force (the force that binds quarks together into protons and neutrons and binds protons and neutrons together in the nucleus) was stronger or weaker by 5%, life would be impossible. If it was appreciably weaker, none of the neutrons at the Big Bang could’ve decayed into protons.

The “weak” nuclear force is 10 to the 25th power stronger than Gravity. That’s times stronger! Electromagnetism – the force we know best – is 10 to the 36th power stronger than Gravity. That’s 000 times stronger!

The strong nuclear force pulls together protons and neutrons in the nucleus. At very small distances only, such as those inside the nucleus, this strong force overcomes the electromagnetic force, and prevents the electrical repulsion of protons from blowing the nucleus apart.

If the strong force didn’t exist, there would be nothing but hydrogen and neutrons floating in space. When the protons and neutrons are apart there is no strong force but when they are together to resemble a nucleus, the strong force is in action.