Newton's law terms

Question 1

What is a force(F)?

Answer 1

Any kind of pull or push on an object in an attempt to change the object’s state of rest or motion.

Question 2

Normal force(Fn)?

Answer 2

The force which a surface exerts on an object with which it is in contact, and which is perpendicular to the surface.

Question 3

Frictional force(f)?

Answer 3

A contact force that opposes the motion of an object and which act parallel to the surface.

Question 4

Static frictional force(Fs)?

Answer 4

The force that opposes the tendency of a stationary object relative to a surface.

Question 5

Kinetic frictional force(Fk)?

Answer 5

The force that opposes the motion of a moving object relative to a surface with which it is in contact.

Question 6

Newton’s First Law of Motion?

Answer 6

A body will remain in its state of rest or motion at constant velocity, unless a non-zero resultant/net force acts on it.

Question 7

Inertia?

Answer 7

The property of a body that enables it to resist change in its state of motion.

Question 8

Newton’s second law of motion?

Answer 8

When a resultant is applied to an object, the object will accelerate in the direction of the force. The acceleration is directly proportional to the force and inversely proportional to the mass of the object.

Question 9

Newton’s third law of motion?

Answer 9

When one body exerts a force on a second body, the second body exerts a force of equal magnitude in the opposite direction on the first body.

Question 10

Newton’s law of Universal Gravitation?

Answer 10

Every body in the universe attracts every other body with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centres.

Question 11

Weight(Fg/W)?

Answer 11

The gravitational pull of the earth on an object on or near its surface.

Question 12

Net or resultant force(Fnet)

Answer 12

The net or resultant force is the vector sum of all the forces acting on an object.

Question 13

Equilibrium

Answer 13

Objects that are at rest or moving with constant velocity and have no net force acting on them

Question 14

Weightlessness

Answer 14

An object is weightless if no contact force acts on it.

Question 15

Apparent weight

Answer 15

The contact force exerted by a surface on an object

Question 16

Tension

Answer 16

Acts along a rope which is supporting or pulling an object;tension is considered to be the same on magnitude at both ends of the rope(has the same magnitude anywhere in the rope, even when bent around corners);direction of tension in the rope is away from the surface of the object to which is is attached.

Question 17

Free body diagram

Answer 17

A diagram where the object of interest is drawn as a dot and all the forces acting on it are drawn as arrows pointing away from the dot.