Speed & Velocity
Acceleration
Newton's Laws
Balanced & Unbalanced Forces
Simple Machines
100
If you say a bird flies 30km/hr west, you are describing its what?
Velocity
100
A change in velocity over time is known as what?
Acceleration
100
For every action, there is an equal and opposite reaction. Which of Newton's Laws is this?
3rd Law
100
What is the force that opposes motion of an object?
Friction
100
__________= force x distance.
Work
200
According to this graph, how many times does the object stop moving?
Once
200
What are three ways in which an object can accelerate?
Change its speed, change its direction or change both speed and direction.
200
Which law is also known as the law of inertia?
1st Law
200
If two forces are working in opposite directions of one another, how do you calculate net force?
subtract the forces to get net force
200
In order for work to be done an object, a force must be applied to the object and the object must move in the ________ direction of the force.
same
300
The object is moving at a constant speed of 10 m/s.
300
The object is slowing down (decelerating).
300
What is the relationship between mass and inertia of an object?
They are directly related. The more mass an object has, the more inertia it has. The less mass an object has, the less inertia it has.
300
What is the total amount of force acting on an object known as? (the combination of all forces acting on an object)
net force
300
An inclined plane wrapped around a cylinder is what type of simple machine?
screw
400
Jasmine can run 50 yards in 10 seconds. Rebecca can run 20 yards in 5 seconds. Which runner has a faster speed AND what is her speed?
Jasmine- 5yards/second
400
What is the formula for acceleration?
Vf-VI/time
400
A train comes to a sudden stop but all of the passengers continue to move forward. This is an example of which one of Newton's laws?
1st Law
400
If a book is sitting at rest on top of a table, then the forces that are acting on the book must be ___________________.
balanced
400
A slide at a playground is an example of what type of simple machine?
Incline Plane
500
Draw a distance-time graph that shows an object decreasing in speed over time.
500
A cyclist accelerates from 0 m/s to 8 m/s in 3 seconds. What is his acceleration?
2.67 m/s2 (2.66666666)
500
It takes less force to push a stroller than it does to push a stroller with someone sitting in it. This statement is true according to which one of Newton's laws?
2nd Law
500
When net force is equal to 0N, forces are said to be __________________?
balanced
500
What type of simple machine is being used to split the wood?
Wedge