1
SI unit for measuring distance
m
Meter
To describe an object’s motion, you need to know its speed and its _______________
Speed and Distance
True or False:
Balanced forces do not change the motion of an object.
True
True or false:
The strength of a force is measured in Newtons.
True
Newton Law:
It states an object at rest will remain at rest unless acted upon by a nonzero net force.
1st Newton Law
Both units for acceleration
km/h and m/s
Speed of an object at an exact instant in time
Instantaneous speed
A force that pulls objects toward each other, like the moon to the Earth
Gravity
True or False:
A circle can be used to represent the direction and strength of a force.
False:
An arrow can be used to represent the direction and strength of a force.
Newton Law:
It states that an object’s acceleration depends on its mass and on the net force acting on it.
2nd Newton Law
It refers to an object changing position relative to another object
Motion
Speed of the object over a longer period of time
Average speed
A measure of the force of gravity on an object.
Weight
A characteristic of a moving object that is related to mass and the velocity of the object.
Momentum
Newton Law:
It states that if one object exerts a force on another object, then the second object exerts a force of equal strength in the opposite direction.
3rd Newton Law
Name of the length of the path between two points
Distance
Speed in a given direction, such as West or Up
Velocity
Law of ______
It states that the force of gravity acts between all objects in the universe that have mass.
Law of universal gravitation
Law of ______
It states that in the absence of outside forces like friction, the total momentum of objects that interact does not change.
Law of conservation of momentum
If Manuel exerts a force of 10 N to push a desk to the right at the same time Lynn exerts a force of 15N to push the desk to the left, to where will the desk move?
Net Force = Bigger force - Smaller force
Net force = 5 N to the left
Place or object used for comparison to determine if something is in motion
Refence point
The rate at which the velocity of an object changes
Acceleration
You walk 750 meters to a friend’s house and it takes you 500 seconds to get there. What is the average speed for your walk?
S = d / t
Speed= 1.5 m/s
What amount of force is needed to accelerate a 3 kg skateboard at 9 m/s2 ?
F = m × a
Force = 27 N
What is the momentum of a 1000-kg vehicle traveling at a velocity of 25 m/s?
p = m × v
Momentum = 25,000 kg × m/s