Forces and Motion Part 2

Question 1

What is acceleration?

Answer 1

A change in velocity
Deceleration - negative acceleration, slowing down
Measured in m/s2

Question 2

Equation to shoe relationship between acceleration, velocity and time:

Answer 2

a = Δv / t
acceleration = change in velocity / time taken

Question 3

Equation for final speed

Answer 3

v2 = u2 + 2as

final speed)2 = (initial speed)2 + (2 * acceleration * distance

Question 4

Equation to show relationship between force, mass and acceleration:

Answer 4

F = ma
force = mass * acceleration

Question 5

Equation to calculate weight

Answer 5

W = mg
weight = mass * gravitational field strength (10)

Question 6

What is momentum

Answer 6

How difficult it is to stop a moving object

Measured in kg m/s

Question 7

Equation to show relationship between momentum, mass and velocity:

Answer 7

p = mv 
momentum = mass * velocity

Question 8

What is the law of conservation of momentum?

Answer 8

Momentum before a collision = momentum after a collision

Question 9

Equation to show relationship between force, change in momentum and time taken::

Answer 9

force = change in momentum / time taken

F = (mv - mu) / t

Question 10

What is terminal velocity?

Answer 10

The maximum speed of an object, reached when the forces moving the object are balanced by its frictional forces.