Force
If an object is pushed from both sides with 100N, what will happen to the object?
Will a more mass object or less massive object take more force to stop?
More massive object
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
When something slows down due to friction, in what direction is the force applied?
opposite direction
What is required to change the velocity of an object?
force
What are the 5 ways an object can change velocity?
Start, Stop, Speed Up, Slow Down, or Change Direction
A push or pull that can cause motion
force
Sandra pushed a wooden block and it slid across the floor. The wooden block gradually slowed down and stopped after moving 10 meters. Why did the block stop moving?
Friction
In a collision, forces are exerted with....(strength & direction)
equal strength and in the opposite direction
To stop an object, the force must come from:
the opposite direction of the object's motion
It takes more force to slow down your bicycle by 5 mph than to speed it up 5 mph. True or False
False
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 car drove 200 kilometers in 4 hours. What was the cars average velocity?
50 kilometers/hour
To speed up an object, the direction of force should be:
in the same direction of the object's motion
Speed with direction
Velocity
the sum of forces on an object
net force
A pod hits a space station. The space station is much more massive than the pod. The pod experiences a much greater change in velocity. True/False
True
Three golf balls with the same mass were rolling on the ground. Each ball was hit by a golf club, but not from the same direction. All the golf balls changed speed as a result of being hit. Ball A speeds up by 2cm/s, Ball B speeds up by 2cm/s and Ball C slows down by 2cm/s. Which ball experienced the strongest force?
All 3 experienced the same force because they all changed velocity by the same amount.
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 greater change in velocity?
less mass
inertia
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
When an objects velocity doubles, what happens to kinetic energy?
It quadruples (x4)