Physics

Question 1

Speed

Answer 1

an objects change in distance with respect to time

Question 2

Velocity

Answer 2

an objects change in displacement with respect to time

Question 3

Distance

Answer 3

is a measure of how far an object has travelled

Question 4

Displacement

Answer 4

is a measure of distance and direction in relation to the start and finish

Question 5

Force

Answer 5

vector quantity (direction and magnitude)
External action (push or pull) that causes a mass to change its velocity

Question 6

Newton’s 1st law of motion

Answer 6

An object at rest will remain this way unless acted upon by a force
An object moving will continue to move in the same speed and direction unless an unbalanced force acts on it

Question 7

Newton’s 2nd law of motion

Answer 7

F = ma
An object will accelerate in the direction of an unbalanced force acting on it.
Size of acceleration depends on the mass of an object and the size of the force acting on it.

Question 8

Newtons 3rd law of motion

Answer 8

For every action/force, there is an equal and opposite reaction force.

Question 9

Inertia

Answer 9

objects resistance to a force or change in motion

Question 10

Acceleration

Answer 10

force acts on an object, increasing velocity, object is accelerating
velocity decreases, object decelerates (negative acceleration)

Question 11

Terminal velocity

Answer 11

final velocity at which an object falls, no further acceleration possible due to air resistance

Question 12

Kinetic energy

Answer 12

energy of a moving object
depends on the objects velocity and mass

Question 13

Potential energy

Answer 13

object that possess’ potential (stored) energy and object positioned above the ground

Question 14

Work

Answer 14

change in potential energy.
transfer of energy

Question 15

law of conversation of mass

Answer 15

energy may be transferred from one object to another but it is never created or destroyed
total energy involved stays the same