If you say a bird flies 30km/hr west, you are describing its what?
Velocity
A change in velocity over time is known as what?
Acceleration
For every action, there is an equal and opposite reaction. Which of Newton's Laws is this?
3rd Law
What is the force that opposes motion of an object?
Friction
__________= force x distance.
Work
According to this graph, how many times does the object stop moving?
Once
What are three ways in which an object can accelerate?
Change its speed, change its direction or change both speed and direction.
Which law is also known as the law of inertia?
1st Law
If two forces are working in opposite directions of one another, how do you calculate net force?
subtract the forces to get net force
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
What is happening in this graph from point A to point B?
The object is moving at a constant speed of 10 m/s.
What is happening in this graph from point B to point C?
The object is slowing down (decelerating).
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.
What is the total amount of force acting on an object known as? (the combination of all forces acting on an object)
net force
An inclined plane wrapped around a cylinder is what type of simple machine?
screw
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
What is the formula for acceleration?
Vf-VI/time
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
If a book is sitting at rest on top of a table, then the forces that are acting on the book must be ___________________.
balanced
A slide at a playground is an example of what type of simple machine?
Incline Plane
Draw a distance-time graph that shows an object decreasing in speed over time.
A cyclist accelerates from 0 m/s to 8 m/s in 3 seconds. What is his acceleration?
2.67 m/s2 (2.66666666)
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
When net force is equal to 0N, forces are said to be __________________?
balanced
What type of simple machine is being used to split the wood?
Wedge