newton's first law cards

zero

If you were in a spaceship and fired a high velocity projectile with a railgun into towards an enemy battle cruiser, how much force would have to be exerted on the projectile to keep it moving once it has left the spaceship?

it doesnt move with respect to the ground but moves backwards with respect to the wagon

suppose you place a ball in the middle of a wagon, and then accelerate the wagon forward. How does the ball move with respect to the ground and with respect to the wagon

the law of inertia

newton's first law is also known as ________.

non-zero net force

what type of force is needed to change an object's velocity?

all of the above

which of the following can a force do?

- cause an object to begin moving

- cause an object to begin slowing down

- cause an object to change directions

- all of the above

has zero net force

an object following a straight-line path at a constant speed _______________.

true

true or false: an object with zero net force can move

false

true or false: an object must move if a force is applied to it

the resistance an object has to changing it's velocity

inertia is _________________.

newton's first law

"buckle up - its the state law" can be explained by:

no applied force is required to maintain a constant velocity

a spacecraft travels at a constant velocity in empty space far away from any center of gravity. what is true about the force applied on the spacecraft?

the bus slowed down

a passenger is standing in a moving bus, facing forward. the person suddenly falls forward. what happened to the bus?

the bus sped up

a passenger is standing in a moving bus, facing forward. the person suddenly falls backward. what happened to the bus?

the bus turned to the left

a passenger is standing in a moving bus, facing forward. the person suddenly falls to the right. what happened to the bus?

a change in velocity can only occur if an object has a nonzero net force applied to it

newtonn's first law states

both

a student on a moving school bus watches another student walk to the back of the bus + measures a distance of 5 m. someone standing still outside of the bus also sees the student walking + measures a distance of 40 m. who’s correct?

all of the above

what is an inertial reference frame?

- frame of view when the viewer is moving at a
constant velocity

- frame of view when the viewer is not moving

- frame of view where the viewer is not rotating

- all of the above

parabola

the path of an object dropped from a moving vehicle will look like a _________ to an outside observer.

no, but we live here so we treat it like one

is the earth an inertial reference frame?

a ball spinning on a person's finger

which of the following is NOT and inertial reference frame

- a ball spinning on a person’s finger

- you sitting in a chair

- a plane flying at a constant speed

- none of the above