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Key Terms
Key Terms Too
Short Answer
Finding Speed
Finding More Speed
100
The overall speed at which an object moves.
What is average speed?
100
When something speeds up.
What is acceleration?
100
Why do stationary objects make the best reference points?
They do not move.
100
What is the equation for finding speed?
Speed equals distance divided by time.
100
What is the equation for finding speed when you have an initial and final speed given?
Speed equals final speed minus initial speed divided by time.
200
The speed of an object at a specific time.
What is instantaneous speed?
200
When object slows down.
What is deceleration?
200
What is the difference between average speed and instantaneous speed?
Average speed is speed over the entire time an object is in motion and instantaneous speed is the speed at a given moment.
200
A train traveled for 4 hours and went 180 miles. What was the average speed of the train?
45 mph
200
A car traveled for 5 hours and went 250 miles. What was the average speed of the car?
50 mph
300
An objects distances changes from another.
What is motion?
300
The push or pull on an object.
What is force?
300
Explain what unbalanced forces in the same direction would do to the net force.
The forces would not be equal. Both would exert force towards the same direction and the object would move in that direction. The net force would be found by adding individual forces.
300
An ant went 2 meters in 13 seconds. What was the average speed of the ant?
.1538 m/s
300
A lady bug crawled 4 meters in 22 seconds. What was the average speed of the lady bug?
.18 repeating
400
Whether or not an object is in motion depends upon the reference point you choose.
What is relative motion?
400
Combination of forces acting on an object.
What is net force?
400
Explain what unbalanced forces in opposite directions would do to the net force.
The forces would not be equal. Both would exert force in different and opposite directions and the object would move in the direction that the greatest force is pushing. The net force would be found by subtracting individual forces.
400
A cheetah is hunting a zebra. The cheetah is jogging at 15 mph until he spots the exact zebra he wants. He accelerates to 70 mph and it only takes him 6 seconds to reach that speed. What is the cheetah's rate of acceleration?
9.16 repeating
400
Time: 5 hours Distance: 4 miles
0.8 mph
500
Speed in a specific direction.
What is velocity?
500
Object used to determine if something is in motion.
What is reference point?
500
What would balanced forces in opposite directions do to the net force?
The forces would be equal. Both would exert force towards opposite directions and the object would not move. The net force would be zero.
500
Ms. Naessig's grandmother begins running at a speed of 2 mph. She sees the finish line and accelerates to a speed of 5 mph in 12 seconds. What is Ms. Naessig's grandmother's rate of acceleration?
.5
500
Distance: 28 miles Time: 27 seconds
1.037 repeating