facts
who is the person that invented the first law?
Issac Newton.
true or false? is a seat belt preventing a person from hitting the dashboard an example of Newton's first law?
true
a car slows down because of a
resisting force
Inertia makes objects in motion ___ in ___
stay, motion
a book resting on a table will say put unless
a force moves it
what is another name for the first law?
the law of inertia
a passenger in a car moves forward when?
the car suddenly stops
what is the measure of an objects inertia
Newton's first law states that an object in motion stays in ___
motion
a bowling ball that is going down a lane will go in a constant speed until it ?
hits the pins or the wall
What is the result when all forces acting on an object are balanced?
Zero acceleration or constant velocity
a soccer ball remains still untill?
kicked (or something moves it)
The natural tendency of objects to keep on doing what they're doing.
inertia
an object at ____stays at rest unless acted upon an _____ force
rest, unbalanced
When a stationary bus starts to move, your lower body moves with the bus, but your upper body lags behind because of inertia. What happens to you?
you fall backwards
Which of the following can an object not do by itself: start, stop, or change direction?
all of the above
true or false? a car's passengers being thrown forward during a sudden stop is Newton's first law
true
the combination of all the forces that act on an object
Net force
___ in orbit have inertia
satellites
A ball is rolling across a perfectly smooth floor in a vacuum. According to Newton's first law, will the ball stop?
no, because there is no unbalanced force
The concept of an object in motion staying in motion is based on the condition of the object's net force being in what state?
zero
true or false? A heavier bowling ball thrown down an alley has more of this force acting on it, which is why it rolls to a stop more quickly than a lighter ball with the same initial velocity.
false
What happens to an object's velocity if the net force acting on it is zero?
it does not change (or it continues with a constant velocity)
If a car and a large truck are both moving at the same constant velocity, the truck will have more difficulty stopping because its greater ____ gives it more inertia.
mass
A 1675 kg car is moving to the right at a constant velocity of 20 m/s. What is the net force exerted on the car