Newtown's Laws Definitions And Formulae

Question 1

Define weight (Fg) and provide it’s formula.

Answer 1

Weight is defined as the gravitational force the Earth exerts on any object on or near it’s surface.

Fg=mg (where g is 9.8 on Earth)

Question 2

Define normal force (Fn).

Answer 2

Normal force is defined as the perpendicular force exerted by a surface on an object in contact with it.

Question 3

Define frictional force.

Answer 3

Frictional force is the force that opposes the motion of an object and acts parallel to the surface with which it is in contact.

Question 4

State Newtons first law.

Answer 4

Newtons first law states that an object continues in a state of rest or uniform (moving with constant) velocity unless it is acted upon by a net or resultant force.

Question 5

State Newton’s second law.

Answer 5

You didn’t second law states that when a net force , Fnet, is applied to an object of mass M the object accelerates in the direction of the net force. The acceleration , a, is directly proportional to the net force and inversely proportional to the mass

Question 6

Provide the equation for Newtons second law.

Answer 6

Fnet=ma

Fnet is resultant force(N)
M is the mass of the object(in kgs)
A is the acceleration of the object (m/s)

Question 7

State Newton’s third law.

Answer 7

When object A exerts a force on object B. Object B simultaneously exerts an equal and opposite force on object A.

Question 8

Define inertia.

Answer 8

Inertia is defined as the property of an object that causes it to resist a change in it’s state of rest or uniform motion.