Force
What is friction?
an force between an object and the surface it is moving over / a opposite force when two objects rub against each other
Which vehicle will take more force to stop?
dumptruck or a mini cooper
dump truck
why?
The amount of matter in an object is called its...
mass
You push a chair across the floor. It gradually slows down and stops. Why did the chair stop moving?
friction from the floor
Both boats have same mass, blue boat speeds up from 2 km/h to 5km/h. Red boat slows down from 10km/h to 5km/h. Which had greater force?
Red - it had a larger change in velocity
5 - 2 = 3 (blue boat)
10 - 5 = 5 (red boat)
5 > 3
What is required to change the velocity of an object?
force
What are the 5 ways an object can move?
Start, Stop, Speed Up, Slow Down, or Change Direction
A push or pull that can cause motion
force
You are playing pool. You hit the white ball and it hits a solid blue ball that is still. What happens to both balls after the collision?
The white ball will stop and the blue ball will start moving.
An empty shopping and a full shopping cart increase speed by 2m/s. which one experienced the greater force.
Full cart - It has more mass meaning it needs more force to have the same change in velocity.
To stop an object, the force must come from:
the opposite direction of the object's motion
What is the relationship between force, mass, and velocity
cause and effect relationship
What forces are different in space?
gravity and air resistance
A pod was supposed to land at the space station. However, the pod is more massive due to the rock samples on board. What does the pod need to experience to connect safely?
The thrusters needed to fire more to stop the pod, because the pod only slowed down during the mission.
If three trains of the same mass each changed speed the exact same amount (slowed down or sped up), what does that tell you about the force that acted on them?
they all experienced the same strength force because they changed speed by the same amount.
To speed up an object, the direction of force should be:
in the same direction of the object's motion
Speed with direction
Velocity
when 2 objects hit each other
collision
Different strength forces acting on an object will cause...
different amounts of velocity change
Messi kicked a soccer ball and it moves at 5 k/m, Mia stopped a soccer ball that was moving at 10 k/m. Who exerted more force on soccer ball?
Mia - Mia caused a greater change in velocity.
To start an object moving, the force must come from:
any direction
An object with less mass collides into an object with more mass. Which object will have the great change in velocity?
less mass
To apply a force
Exert
If the same strength force is exerted on objects of different mass, the force will cause the greatest velocity change in the object with
the least mass.
Why would a more massive object be harder to slow down or speed up?
It takes a stronger force to change the velocity of a more massive object.