Transcript Motion and Forces

Year 10 Pathway C
Mr. D. Patterson
1

Describe forces as a push or a pull that can
change an objects velocity or shape

State Newton’s First Law

Describe the concept of inertia
2

A force is a push or pull which may:
◦ A) Change the shape of an object
◦ B) Change the velocity of an object
3


A force is a vector: it has magnitude and
direction
The magnitude of the force is measured in
Newtons (N)
10 N Down
40 N left
4

Forces can occur even without contact
5


Sir Isaac Newton was a
mathematician and
physicist in the early 18th
Century
Newton developed “three
laws” of motion which
described how objects
move
Newton’s first law of motion:
An object at rest stays at rest and an object in
motion stays in motion with the same
speed.....
unless acted on by an unbalanced force.

No unbalanced
unbalanced forces.
forces.
No
Rock
stayscontinues
at rest. with
Ice
skater
constant speed

These object have inertia

Inertia is the tendency to not change motion
8
Force
Force
9
Force
Stops
pulling
10



A car is travelling at 100km/h when it crashes
into a barricade coming to a complete stop.
The driver is wearing a seatbelt but his
passenger is not.
Explain each persons motion during the crash
using Newton’s first law of motion
Key words: force, rest, unbalanced, inertia

Describe forces as a push or a pull that can
change an objects velocity or shape

State Newton’s First Law

Describe the concept of inertia
12