Force
Which has more friction, rubber, ice, or plexiglass?
rubber
Which vehicle will take more force to stop, a semi truck or a smart car?
A semi truck!
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 causing a force in the opposite direction.
Both boats have same mass, blue boat speeds up from 2 km/h to 5km/h (Speed up by 3km/h). Red boat slows down from 10km/h to 5km/h (Slow down by 5 km/h). Which had greater force?
Red boat had a greater force because it had a greater change in velocity.
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 strength and direction of force is exerted on both objects?
Equal but opposite forces.
An empty shopping cart and a full shopping cart both increase speed by 2m/s. Which one experienced the greater force.
The full cart because it has more mass.
To stop an object, what direction and strength of force is needed?
Same strength force in the opposite direction.
What strength and direction of force do you need to slow down your bicycle?
The force that slows down motion between touching objects.
friction
A pod hits a space station. The space station is much more massive than the pod. The pod experiences a much stronger force than the station. True/False
False
A bug and a car collide, which one experience the stronger force?
They experience the same force in opposite directions.
To speed up an object, the strength and 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
Two objects who have the same mass experienced an unknown force. Object A speed up by 3 m/s and object B slowed down by 3 m/s. Which object experienced the stronger force?
Messi kicked a soccer ball and it moves at 5 k/m, Mia stop a soccer ball that was moving at 10 k/m. Who exerted more force on soccer ball?
Mia
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
There is a collision between a bug and a car. The bug experiences a greater change in velocity because...
it has a much smaller mass
The smart car because a lesser mass needs less force to have a greater change in velocity.