# Newton's law

Newton's first law
Grade-9
Oct 7, 2020
1 / 16
Slide 1: Slide
Science Secondary Education

This lesson contains 16 slides, with interactive quizzes, text slides and 1 video.

## Items in this lesson

Newton's first law
Grade-9
Oct 7, 2020

#### Slide 1 -Slide

INSTRUCTIONS
mute your mics do not on unless instructed
turn on the camera
Join the session with the link and password
Maintain the online session decorum

#### Slide 4 -Video

INERTIA
The tendency of an object to resist change in motion is called the inertia.

#### Slide 5 -Slide

Netwon's first law of motion
It states that if the net force acting on an object is zero, the motion of the object does not change.
An object remains at rest or at constant motion unless an external unbalanced force acts on it

#### Slide 7 -Link

Challenge
How does the unbalanced force changes the motion of an object?

#### Slide 10 -Slide

CHALLENGE
Why should we always wear a seat belt?

#### Slide 11 -Slide

Newton’s first law of motion states than an object’s motion will not change unless
A
the net force acting on it is greater than zero
B
a force continues to be applied to the object.
C
its inertia is stronger than the applied force.
D
the object has no inertia.

#### Slide 12 -Quiz

It is more difficult to start a 50-kg box sliding across the floor than a 5-kg box because the 50-kg box has greater
A
size
B
volume
C
velocity
D
inertia

#### Slide 13 -Quiz

An object’s velocity will not change unless it is acted on by a(n)
A
net force
B
strong force
C
balanced force
D
unbalanced force

#### Slide 14 -Quiz

Friction
Inertia
net force
Tetendency of an object to resist a change in motion
force that opposes the motion of any object
. combination of all the forces acting on an object

#### Slide 15 -Drag question

What are 2 things you understood and one things you want to know?