The rate at which the position of an object changes.
100
What is constant speed?
Speed that does not change.
100
What is acceleration?
The rate in change of velocity
100
What is Newtons first law of motion?
If not force acts on an object, it will remain at rest. If an object is moving, it will remain moving until a force acts on it.
100
What is gravity?
The force of attraction between any two objects that have mass.
200
What is motion?
A change in position
200
What is the equation for speed?
speed = distance/ time
200
What is deceleration?
The rate in which an object slows down.
200
What is Newton's second law of motion?
The amount of force needed to produce a given change in motion of an object depends on the mass of an object.
200
What is the universal law of gravity?
Gravitational force depends on the product of the masses of the two objects involved. Gravitational force depends on on the distance between two objects.
300
What is the average speed when 380 kilometers have been traveled in 2 hours?
190 km/hr
300
What is velocity?
The speed and direction in which an object is moving.
300
What is the equation for acceleration?
acceleration = change in velocity/ change in time
300
What is the third law of motion?
If an object exerts a force on the second object, the second object will always exert a force on the first object. The forces will be equal and in the opposite direction.
300
What can act on a falling object?
Air resistance
400
A rocket can travel at an average rate of 18,000 miles per hour. How far will the rocket travel in 4.5 hours?
81,000 miles
400
How can you tell if a graph is constant speed or varying speed?
If the line is straight, then the speed is constant. If the line is not straight, then the speed varies.
400
Beginning Speed: 40 km/hr
Ending Speed: 50 km/hr
Elapsed time: 5 seconds
What is the acceleration?
2 km/hr per second
400
What is the equation for force?
Force = mass x acceleration
400
What can affect air resistance?
The shape of the object
500
A man rode on a motorcycle for 2 hours. His average speed was 45 miles per hour. How far did he travel?
90 miles
500
Elapsed Time Distance Traveled
0 0
1 200
2 340
3 580
4 760
5 900
Make a line graph for distance versus time.
See student work
500
Beginning Speed: 25 cm/hr
Ending Speed:10 cm/hr
Elapsed time: .5 seconds
What is the acceleration?
-30 cm/sec per sec
500
What is the reaction force when a hammer hits a nail?
The nail hitting the hammer.
500
How does gravity affect acceleration?
The force of gravity causes objects to speed up as they fall. All objects have the same acceleration as they fall.