trimester 2 science 1
Terms
undefined, object
copy deck
- a feather and a rock dropped at the same time from the same height would land at the same time when dropped by...
- an astronant on the moon
- if an object is thrown with a horizontal push and accelerated downward by gravity it is...
- projectile motion
- when a soccer ball is kickedm, the action and reaction forces do NOT cancel eachother out because...
- the forces act on 2 different things
- decreases as the mass of the object increases, increases as the object increases, and is in the same direction as the force of an object
- acceleration
- a golf ball and a bowling ball are moving at the same velocity. which has more momentum?
- the bowling ball, cuz it has more mass
- if three balls of different materials were dropped at the same time from the same height, which would hit the ground first?
- they would hit at the same time
-
a 5 kg object has less inertia than a ____object
(1 kg =1,000 kg) - 6,000g
- according to Newtom's first law of motion , a moving object that is not acted on by an unbalanced force will
- remain in motion
- galileo proved that the rate at which an object falls...
- is not affected by the mass
- all objects accelerate toward the earth at a rate of 9.8 m/s/s. this means that for every second that an object falls, its downward velocity
- increases by 9.8m/s
-
air resistence is...
a.sliding friction
b.rolling friction
c.fluid friction - c. fluid friction
- the amount of air resistence acting of an object depends on the object's ...
- size and shape
- terminal velocity is reached when the net force on an falling object reaches ...
- 0 N.
- astronats float inside the space shuttle because they...
- are in free fall
- ____is a measure of inertia
- mass
- Newton's second law of motion states that an object's acceleration...
- increases as its mass decreases and as the force acting on it increases
- Newton's third law of motion states that if a force is excerted on an object, another force occurs that...
- is equal in size and opposite in direction
- action and reaction force pairs occur...
- only when there is motion
- inertia is used when explaining Newton's...
- 1st law of motion
- terminal velocity...
- has a balanced net force
- becuase of projectile motion, when aiming at a target you should always aim
- above the bull's eye
- what is unbalanced force that maintains circular motion for an object in orbit?
- centripetal force
- if a car driver suddenly makes a sharp turn, the passenger slides to the side of the car because of...
- inertia
- when an airplane takes off, you tend to fall backward beacause of...
- inertia
- when you bump onto someone standingt still, you can knock them over because of
- projectile motion
- the curved path traveled by a thrown baseball is known as
- projectile motion
- any object in circular motion
- constatly changes motion
- projectile motion has two...
- components- horizontal and vertical
-
a force..
a.is expressed in Newtons
b.is push or pull
c.object to speed up change direction, or slow down
d.all of above -
a.is expressed in Newtons
b.is push or pull
c.object to speed up change direction, or slow down - the force of gravity is greater between two objects that
- have greater masses
- balanced forces applied to an object...
- produce a net force of zero
- a force opposes motion between two surfaces that r touching is
- friction
- the planets are held in their orbits by ____forces
- unbalanced
- gravitational force depends on the_______of the objects and the distance between them
- mass
- a black hole's gravitational force increases as
- mass increases
- when gravitational force changes,
- weight changes
- Newton
- force
- m/s south
- acceleration