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# 30 Week Assessment

### TEST

What determines how difficult it is to stop an object? Momentum
The rate of change in velocity is called acceleration
What is used for a comparison when motion is described? Frame of Reference
The rate at which an object moves is its speed
Change in position in a certain amount of time is motion
Speed in a given direction is velocity
A negative acceleration is called deceleration
The velocity of an object changes if
When deceleration occurs, velocity Decreases
An example of constantly changing velocity is Circular Motion
Even when slowly moving a train cannot stop suddenly because of its Large Momentum
Speed that does not change is called Constant
The Law of Conservation of Momentum momentum states that
A distance-time graph for acceleration is always a Curved
When an object slows, it's momentum decreases
Force is necessary to move an object
When forces are balanced, the motion of the object is zero
Which of the following is used to reduce friction?
Which of the following is not an example of fluid friction? Motor oil
Friction produced by wheels or ball bearings is called
What friction has the highest resistance?
An object at rest will remain at rest is explained in Newton’s 1st Law
Newton’s Second Law of Motion relates to
Kg x m/s/s = Momentum
Working with force weight is measured in mass
Newton’s Third Law of Motion describes
Forces act in pairs falls under Newton’s 9.8 m/s
What is the value of gravitational acceleration. Increases
Created by: kurthuizenga