Dynamics

Question 1

Newtons 2nd law?

Answer 1

F=ma

Question 2

Newtons 3rd law

Answer 2

For every action there is an equal and opposite reaction

Question 3

Newtons 1st law

Answer 3

An object will remain at rest or move at a constant velocity in a straight line unless acted on by an unbalanced force

Question 4

Definition of a vector

Answer 4

A vector is a quantity that is not fully described by stating its magnitude

Question 5

Definition of a scalar

Answer 5

A scalar quantity can be described fully by stating it magnitude

Question 6

Speed, distance, time, temperature, mass and energy are all _____ quantities

Answer 6

Scalar

Question 7

Direction, displacement, velocity, force and acceleration are all _____ quantities

Answer 7

Vector

Question 8

Definition of acceleration

Answer 8

The change in speed or velocity of an object over a certain time

Question 9

What is it called when the vertical forces are balanced and the object is falling at a constant speed?

Answer 9

Terminal velocity

Question 10

The acceleration of an object falling will always be…

Answer 10

9.8 ms-2

Question 11

Explanation of satellites orbits

Answer 11

With the high horizontal speed -constant horizontal speed- the projectile falls around the curvature of the earth.

Question 12

The horizontal speed of a projectile is always….

Answer 12

Constant from its initial speed