Vocabulary
What is force?
A force is a push or a pull
What is acceleration?
Acceleration is the rate of change in velocity, how quickly something speeds up, slows down, or changing direction
What Law of Newton's is this:
An object in motion or at rest will remain that way unless acted upon by an unbalanced force.
1st
What is the formula for Velocity?
Velocity = d/t
A scientist is doing an experiment to test whether a certain type of tire is better for driving in snow. They have 4 different tires with various treads. The car is going 30 miles per hour when the brakes are applied. The distance the car slides to a stop is measured.
What are the independent and dependent variables?
Independent variable: type of tire (what is being tested)
Depenedent Variable: distance it takes to stop
Contact forces
What is inertia?
Inertia is the tendency of an object to remain in motion or at rest.
What Law of Newton's is this:
For every action, there is an equal and opposite reaction.
3rd Law
What is formula for distance?
d = v x t
A scientist is doing an experiment to test whether a certain type of tire is better for driving in snow. They have 4 different tires with various treads. The car is going 30 miles per hour when the brakes are applied. The distance the car slides to a stop is measured.
What are 3 controls?
Three constants:
brakes, car, ice surface, speed before brakes pressed, how much braking is applied
What is friction?
A force that prevents or opposes motion
What are two types of forces?
1. Contact
2. Applied
What Newton's law is this?
The acceleration of an object depends on the mass of the object and the force applied to it.
2nd law
t = d/v
Forces are vector quantities which means they will have what two things?
Magnitude (numerical amount)
Direction
A universal force, meaning it acts on all objects in the universe.
State Increase, Decrease, or Same amount of Friction:
Adding more mass?
increases friction
3rd
A car traveled 50 km in 20 minutes. Calculate the velocity (give units)
v = d/t
v = 50/20
v = 2.5 km/min
State if it is a balanced or unbalanced force
Object slowing down
Unbalanced force
What is velocity?
Velocity is the rate of change in distance.
State Increase, Decrease, or Same amount of Friction:
Increasing the smoothness of the surface
Decreases friction
There are two balls being pushed by people, one has a mass of 40, and another has a mass of 400. Which one has more inertia and why?
The large circle has more inertia because it has more mass
What is the velocity of driving 90 miles in 60 minutes
v = d/t
v = 300/60
v = 1.5 miles/min
State if it is a balanced or unbalanced force
An object in constant velocity, an object at rest, or an object moving at the same speed in a circle
balanced forces