Newton's Laws
What is Newton's First Law?
This law, also known as the law of inertia, states that an object in motion stays in motion unless acted upon by an external force.
What is acceleration?
The formula for force is mass times this
f=ma
In science, work depends on:
a. force and momentum
b. force and distance
c. acceleration and velocity
d. displacement and speed
b. force and distance
A car is driving 65 miles per hour for 2 hours. This is how far the car traveled.
D= s x t
130 miles
These can act as a medium through which a wave travels.
solids, liquids, and gases
What is Newton's Second Law?
This law states that the force on an object is equal to its mass times its acceleration.
What is friction?
It's the force that slows down or stops objects when they rub against each other
T or F? Pushing an object with all your strength but not being able to move it is an example of work.
T
A light bulb that uses 100 J of energy every second.
The formula for power is:
p=w/t
This is the amount of power that is generated.
100 W
These types of waves require a medium in which to travel
mechanical waves
What is Newton's Third Law?
This law explains why when you push on a wall, the wall pushes back with an equal and opposite force.
What is gravity?
The force that pulls objects toward each other, like how it makes things fall to the ground.
What are newtons?
Forced is measured in these, which is named after the physicist who developed the laws of motion.
Jane applies 6 newtons to open a window 3 meters. This is how much work she is doing.
w= f x d
18 N
Sound waves travel in these types of waves - where the vibration moves in the same direction as the wave.
longitudinal waves
According to this law, a soccer ball will not move until someone kicks it.
Newton's first Law
The strength of gravity depends on these two things:
a. What is mass and distance between masses?
b. What is mass and velocity?
c. What is velocity and speed?
d. What is force and acceleration?
a. What is mass and distance between masses?
This is stored energy- like when a roller coaster reaches the top of a hill.
Potential energy
Ben climbs a tree to retrieve a lost football. If he does 2,400 J of work to climb 8 m, how much force is he using?
w= f x d
300 Newtons
Seismic waves are this type of wave.
surface waves
This law can be used to calculate the amount of force needed to accelerate an object
Newton's Second Law
The type of force is an upward force by a fluid that allows it to float.
a. gravitational force
b. spring force
c. bouyant force
d. air tension force
c. bouyant force
This is energy in motion.
kinetic energy
Bobby weighs 30kg and is standing on a cliff that is 3m high. This is how much potential energy Bobby has.
GPE= mgh
g= 9.8m/s^2
882 joules
The distance between the crest of two waves is known as this.
wave length