Forces

Question 1

What are forces?

Answer 1

A force is a push or pull upon an object resulting from the object’s interactions with another object. Whenever there is an interaction between two objects, there is a force upon each of the objects.

Question 2

Name some forces.

Answer 2

Applied force / gravitation force / normal force / friction / air resistance / spring / magnetic / electrical

Question 3

What is a magnetic force?

Answer 3

Magnetic force is a attraction or repulsion that arises between electrically charged particles because of their motion.

Question 4

What are magnetic metals?

Answer 4

Iron, Nickel, Cobalt, Steel, Gold, Rare earth metals, Stainless steel.

Question 5

What’s gravitational force?

Answer 5

Gravity is a force that attracts objects toward each other. For example we are pulled toward the ground because of gravity. The gravitation force pulls direction towards the centre of any object.

Question 6

What’s the formula of weight on moon?

Answer 6

Weight (N) = mass (KG) x 1.66 (g)

Question 7

Who invented gravity?

Answer 7

Issac Newton

Question 8

What is the 1st law of gravity?

Answer 8

An object will not change its motion unless a force acts in it.

Question 9

What’s the 2nd law?

Answer 9

The force on an object is equal to its mass times its acceleration.

Question 10

What’s the 3rd law?

Answer 10

When two objects interacts, they apply forces to each other of equal magnitude and opposite direction.

Question 11

Air resistance

Answer 11

Air resistance describes the forces that are in opposition to the relative motion of an object as it passes through the air. These drag forces act opposite to the oncoming flow velocity, thus slowing the object down.

Question 12

What does air resistance affect?

Answer 12

With air resistance, acceleration through trout a fail gets less than gravity because air resistance affects the movement of the falling objects by slowing it down. How much it slows the object down depends on the surface area of the object and its speed.

Question 13

What is the air resistance on earth?

Answer 13

9.8 meters per square second.

Question 14

What’s a spring force?

Answer 14

A spring force is the force exerted by a compressed or stretched spring upon any object that is attached to it. It is used to find the weight of something by putting it under the spring and see how far down it drops. Then you ……