Motion in a straight line and Forces

SUVAT, equations and forces

What is displacement?

A particle moving from point A to point B with respect to reference point O

AB = OB - OA

What is the difference between average and instantaneous velocity?

Measured in m/s

What is average and instantaneous acceleration?

Measured in m/s

What do the elements in SUVAT represent?

s = displacement

u = initial velocity

v = final velocity

a = acceleration

t = time

What are the SUVAT equations?

What does the gradient of the line and area under the graph mean in a velocity-time graph?

Gradient of the line = acceleration

Area under the graph = distance covered

What values does gravity take?

g = 9.8ms^2 or g = 10ms^2

What is force measured in?

N: Newtons

or kg m/s^2

What are some common examples of non-contact force?

Weight (Gravitational force)

Magnetic Force

Electrostatic force

What is the equilibrium of forces?

When the resultant force is zero

What are some common examples of contact force?

Normal Force

Friction

Tension Force

Air resistance

What is contact force?

A force that involves direct contact between two bodies

What is non-contact force?

The force between two objects that are not physically touching each other

What is resultant force?

Any number of forces applied to at a point on a body have the same effect as a single force equal to vector sum of these forces

How do you find the horizontal component of force?

F(x) = Fcosθ

How do you find the horizontal component of force?

F(y) = Fsinθ

When does the equilibrium of forces happen?

When the resultant force is zero

If a body is at rest, what is the value of the resultant force?

It is in equilibrium therefore the resultant force is zero

What are the SI units for distance and time?

Distance = metres

Time = seconds

How do you find the sum of vertical and horizontal components?

F = √(Fx^2 + Fy^2)