Forces
What is a force?
A push or a pull.
What word means "movement"?
Motion
Newton's First Law says that an object in motion will ______.
Remain in motion unless acted up by an outside force.
What happens when you use a big force?
Big changes in motion- faster movement
Newton's third law says every action has an equal and opposite ______.
Reaction.
What force pulls objects towards Earth?
Gravity
What is speed?
How fast something moves.
A soccer ball won't move until you kick it. Which law explains this?
Newton's First Law
Which is harder to push: an empty box or a full one?
A full one (more mass)
When you jump, what do you push on?
The ground
What force slows things down when they rub together?
Friction
If a ball rolls farther on tile than on carpet, which force is different between the two surfaces?
Friction- less on tile, more on carpet
What keeps the coin from moving with the card in the card flick trick. Hint- begins with the letter I
Inertia- if something is still it wants to stay still.
Newton's second law says Force = _____ x ______
Mass x Acceleration
If a swimmer pushes water backwards, what happens to them?
They move forward.
True or False: Forces can only make things move faster.
False- they can speed up, slow down, stop, or change direction.
A skateboarder speeds up as they go down a hill. This is an example of a change in _____.
Acceleration or speed
When a car stops suddenly, your body keeps moving forward. Why?
An object in motion stays in motion
Why does a bowling ball move slower than a soccer ball when both are kicked?
More mass needs more force
A rocket pushes gas downward. What happens to the rocket?
It goes upward.
What force helps your shoes grip the gym floor?
Friction
If you push a shopping cart harder, what happens to its speed?
It increases- speeds up.
Why do hockey pucks slide far on ice?
Low friction.
If two people push a sled, why does it go faster than if one person pushes?
More force.
Name a sport where you use a strong force to make something move.
soccer, basketball, baseball, dance movements, skating, swimming...