Gravity
Large objects have more gravity than small objects.
True or False
True
What is mass?
It is the amount of matter in an object.
What does it mean when we say that an object is stationary?
it is not moving.
What do arrows represent in a force diagram?
direction and size of a force
Which planet have less gravity? Mercury or The Earth? Why?
Mercury because it is smaller.
How is gravity measured?
It is measured in newtons
What is weight?
It is the pulling force of gravity on an object.
When the forces are equal in size acting from opposite directions how are the forces?
The forces are balanced.
What does a longer arrow represent?
A stronger force
Are your weight and mass the same on Earth and on the MOON?
No, they aren't
Is gravity a contact force? and why?
No, it isn't because it pulls down the objects without touching them.
How do we measure mass?
we use kilograms to measure the mass of an object.
Why do astronauts float in the Moon?
Because the gravity force is weaker than on Earth
How do we represent forces?
with a force diagram
What type of force is magnetism?
it's a noncontact force
Does the Earth have more gravity than the moon? Why?
Yes, it does because the Earth is bigger than the moon.
What is your mass on Earth and your mass on the Moon?
it is the same.
If a ball is moving and you continue pushing it in the same direction, what happens?
it accelerates
What does a weaker force represent?
a weaker force
Is friction force contact or non contact?
it's a contact force
What is gravity?
It is a non contact force that pulls objects down.
What is your weight in outer space? How do you know it?
it's 0 Newtons because there is no gravity in outer space
If a ball is moving and you push it in the opposite direction by using the same force, what happens?
The ball stops.
Whisch forces are represented in a stationary object.
Normal and gravitational force in balance
If you have to multiply your mass by 10 to get your weight. What is your weight in Newtons?
Eg. 30 x 10 = 300 newtons