Dynamics

Question 1

Friction

Answer 1

A resistive force that opposes motion. It acts between two surfaces in contact

Question 2

Acceleration of an object if there is no air on earth

Answer 2

9.8ms-2

Question 3

Horizontal motion formula
Verticle motion formula

Answer 3

V=d/t

a=v-u/t.

Question 4

Straight line formula

Answer 4

Y=mx+c

Question 5

If forces are unbalanced the object is

Answer 5

Accelerating or decelerating

Question 6

If the forces are balanced an object is

Answer 6

Stationary or moving at a constant speed

Question 7

When calculating displacement use

Answer 7

Pythagoras + trigonometry

Question 8

Scalar

Answer 8

Quantity fully described by its magnitude and unit

Question 9

6 scalar quantities

Answer 9

Time
Mass
Energy
Distance
Speed
Power

Question 10

6 vector quantities

Answer 10

Displacement
Acceleration
Velocity
Weight
Momentum
Force

Question 11

Vector

Answer 11

Quantity fully described by its magnitude unit and direction

Question 12

Terminal velocity

Answer 12

Constant speed when the forces are balanced

Question 13

Acceleration

Answer 13

Change in velocity per second