Newton's Laws

Question 1

Force

Answer 1

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

Question 2

Contact force

Answer 2

Force objects exerts on each other when they touch or connect with one another

Question 3

Applied force

Answer 3

A force that is externally applied to an object

Question 4

Normal force

Answer 4

Is a force that a surface exert on an object with which it is in contact, and is perpendicular to the surface

Question 5

Frictional force

Answer 5

Is a contact force that oppose the motion of an object and which acts parallel to the surface

Question 6

Static frictional force

Answer 6

Is the force that oppose the tendency of motion of a stationary object relative to the surface

Question 7

Maximum static frictional force is dependent on two factors which are

Answer 7

~normal force that the surface exerts on the object(the greater the weight the greater the normal force)

~the material of the surface

Question 8

Kinetic frictional force

Answer 8

The force that oppose the motion of a moving object relative to a surface

Question 9

Newton’s first law

Answer 9

A body will remain in it’s state of rest or motion at constant velocity unless acted on by a non zero resultant force

Question 10

Inertia

Answer 10

The resistance of an object to any change in it’s state of motion

Question 11

Buoyancy

Answer 11

Is the upward force experienced by any object placed in a liquid

Question 12

Importance of wearing seatbelts

Answer 12

~ stop your motion and keep you in your seat

~protects you from your own inertia

~provide a safe unbalanced force to stop your forward motion and protect you from injury

Question 13

Newton’s second law

Answer 13

When a net or resultant force acts on an object, the object will accelerate in the direction of the force at an acceleration directly proportional to the force and inversely proportional to the mass of the object

Question 14

Tension

Answer 14

Is the force in a rope or a string when it is stretched

Question 15

Newton’s third law

Answer 15

When object A exerts a force on object B, object B simultaneously exerts an oppositely directed force of equal magnitude on object A

Question 16

Action reaction properties

Answer 16

~have the same magnitude
~opposite each other
~they donnot cancel each other out as they act simultaneously

Question 17

Newton’s Law of Gravitation

Answer 17

Each particle in the universe attracts every other particle with a gravitational force that is directly or proportional to the product of their masses and inversely proportional to the square of the distance between them

Question 18

Weight

Answer 18

The gravitational force, in newton’s, exerted by the earth on an object

Question 19

Mass

Answer 19

The amount of matter in a body measured in kilogram

Question 20

Weightlessness

Answer 20

The sensation experienced when all contact forces are removed