Newton's Laws

Question 1

Normal force

Answer 1

Define ‘N’ as the force or a component of a force which a surface exerts on an object with which it is in contact, which is parallel to the surface

Question 2

Static frictional force

Answer 2

The force that opposes the tendency of motion of a STATIONARY object, relative to a surface

Question 3

Static kinetic force

Answer 3

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

Question 4

Newton’s 1st law

Answer 4

An object remains in its state of rest or motion of constant velocity unless acted upon by an unbalanced force

Question 5

Newton’s 2nd law

Answer 5

When net force is applied to an object, the object accelerates in the direction of the net force. Acceleration is directly proportional to net force and inversely proportional to the mass of the object

Question 6

Newton’s 3rd law

Answer 6

When object A exerts a force on object B, object B simultaneously exerts a force equal in magnitude but opposite in direction on object A

Question 7

Law of universal gravitation

Answer 7

Every body in the universe attracts every other body with a force proportional to the product of their masses and inversely proportional to the square of the distances between them

Question 8

Newton’s law of motion in relation to momentun

Answer 8

The net force applied to an object is equal to the rate of change of momentum in the direction of the net force

Question 9

The law of conservation of momentum

Answer 9

The total linear momentum in an isolated system remains constant

Question 10

Isolated system

Answer 10

A system where the external net force is equal to zero

Question 11

Momentum

Answer 11

Linear momentum is equal to the product of an objects mass and velocity

Question 12

Impulse

Answer 12

The net force exerted on an object and the time it takes

Question 13

Weightlessness

Answer 13

The sensation experienced when all contact forces are lost

Question 14

Contact forces

Answer 14

Forces theat occur when 2 objects are physically in contact

Question 15

Non contact forces

Answer 15

Forces that occur even though the objects are not touching

Question 16

Free body diagram

Answer 16

A diagram that shows the relative magnitudes and directions of forces acting on a body that has been isolated from its surroundings

Question 17

Mass

Answer 17

The amount of matter in a body( measured in kg )

Question 18

Weight

Answer 18

The gravitational force exerted on an object( N)

Question 19

Impulse momentum theorem

Answer 19

Fnet∆t=m∆v=m(vf-vi)

Question 20

Inertia

Answer 20

The resistance of a body to change its state of rest or motion at constant velocity

Question 21

Principle of conservation of momentum

Answer 21

The TOTAL linear momentum in an isolated system remains constant

Question 22

Elastic collision

Answer 22

A collision during which the kinetic energy is conserved

Question 23

Inelastic collision

Answer 23

A collision during which kinetic energy is not conserved

Question 24

1D motion

Answer 24

Motion in a straight line

Question 25

Acceleration

Answer 25

The rate of change of velocity(m.s^-2)

Question 26

Acceleration due to gravity

Answer 26

The acceleration of a body due to the force of attraction of the Earth

Question 27

Displacement

Answer 27

The change in position of a body(m)

Question 28

Free fall

Answer 28

A type of motion in which the only significant vertical force acting on a body is the object’s mass

Question 29

Gravitational force

Answer 29

A force of attraction of one object on another due to their masses

Question 30

Position

Answer 30

Where an object is relative to a reference point

Question 31

Projectile

Answer 31

An object in free fall

Question 32

Velocity

Answer 32

The rate of change of displacement

Question 33

Collision

Answer 33

An isolated system in which 2 moving bodies exert forces on each other over a relatively SHORT time.

Question 34

System

Answer 34

A collection in which there are 2 or more objects that interact with each other.

Question 35

External force

Answer 35

A force that is outside of a system.