Force Vocabulary

Question 0

Net force:

Answer 0

Sum of all the forces that are acting on an object

Question 1

Force:

Answer 1

A push or pull exerted on an object

Question 2

Friction:

Answer 2

Force that opposes the sliding motion between two touching forces

Question 3

Gravity:

Answer 3

Attractive force between two objects that depends on the masses of the objects and the distance between them

Question 4

Field:

Answer 4

A region of space in which every point has a physical quantity, such as a force

Question 5

Weight:

Answer 5

As the force exerted on a body by gravity. This is often expressed in the formula W = mg, where W is the weight, m the mass of the object, and g gravitational acceleration.

Question 6

Newtons First Law of Motion:

Answer 6

The three laws proposed by Isaac Newton to describe the motion of a body upon which forces may act and which may exert forces on other bodies, used as the basis of classical mechanics.

Question 7

Newtons Second Law of Motion:

Answer 7

The relationship between an object’s mass m, its acceleration a, and the applied force F is F = ma. Acceleration and force are vectors (as indicated by their symbols being displayed in slant bold font); in this law the direction of the force vector is the same as the direction of the acceleration vector.

Question 8

Newton’s third law of motion:

Answer 8

For every action there is an equal and opposite reaction.

Question 9

Inertia:

Answer 9

Newton’s first law of motion states that “An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.”

Question 10

Air resistance:

Answer 10

A force that is caused by air. The force acts in the opposite direction to an object moving through the air.

Question 11

Terminal Velocity:

Answer 11

Air resistance equals in magnitude the weight of the falling object. Because the two are oppositely directed forces, the total force on the object is zero, and the speed of the object has become constant.

Question 12

Free fall:

Answer 12

the hypothetical fall of a body such that the only force acting upon it is that of gravity.

Question 13

Centripetal Force:

Answer 13

A force that acts inwards on any body that rotates or moves along a curved path and is directed towards the centre of curvature of the path or the axis of rotation.

Question 14

Law of Conservation of momentum:

Answer 14

The principle that the total linear or angular momentum in any isolated system is constant, provided that no external force is applied