Newton's Laws

Question 1

What does Newton’s first law state?

Answer 1

An object tends to stay at rest and an object at motion stays in motion unless acted upon by an external force.

Question 2

What is inertia?

Answer 2

The tendency of an object to remain at rest or in motion.

Question 3

What is weight?

Answer 3

Is the force of gravity acting on an object.

Question 4

What is an external force?

Answer 4

A force acting on an object outside the system as opposed to the ones within the system.

Question 5

What is the formula for weight?

Answer 5

Weight = Mass x Gravitational Field Stregnth (9.8 m/s^2)

Question 6

What does newton’s second law state?

Answer 6

The force acting on a body is proportional to the product of its acceleration by its inertial mass.
F = ma

Question 7

What does Newton’s third law state?

Answer 7

If object A exerts a force on object B then object B exerts a force on object A equal in magnitude but opposite in direction. These forces act on each other simultaneously.

Question 8

What is the normal force?

Answer 8

The perpendicular contact force exerted on an object on a surface.

Question 9

What is a friction force?

Answer 9

The parallel contact force acting on an object on a surface.

fr = μN

Friction Force = coefficient of friction x Normal Force

Question 10

What is the difference between static and kinetic friction?

Answer 10

Static friction is the frictional force acting on a body that is resting, while kinetic friction is acting on an object that is in relative motion.