Speed
If you know the distance an object travels, what other information do you need in order to determine speed?
Time
A golfer hits a golf ball as hard as he can. Then he gently taps the golf ball. When did it go farther?
During the first hit
If a toy car rolls over a tile floor, and then over carpet, when does it travel faster?
Over the tile floor
A horizontal line one a distance/time graph means...
The object is stopped
Distance
A student pushes an empty box across the floor. Then they fill it with books and push it with the same force. When did the box travel faster?
When it was empty
A skateboard rides down a sidewalk, then goes over rough gravel. When does the skateboard travel faster?
Over the side walk
A steep, straight line on a distance/time graphs means the object is travelling...
fast
An object travels 300 miles in 6 hours, how fast does it travel?
50 miles per hour
A student kicks a soccer ball and bowling ball (ouch!) with the same force. Which one travels farther?
Soccer ball
What is a word that you can use to describe being slowed down by the wind?
Drag or Air resistance
A shallow, straight line on a distance/time graph means...
the object is traveling slowly
A student runs 48 meters in 12 seconds. How fast did the go?
4 meters per second
Car
What concept are you testing if you roll a car down a ramp, then you roll the same car down a ramp covered in sand paper?
Friction
A line that starts at the top of a distance/time graph and then goes down means...
A baseball travels 420 feet in 6 seconds. How fast did it go?
70 feet per second
A car and a cement truck travel 50 miles per hour. They both apply the same force to the brakes. Which one takes longer to stop?
Cement truck
Besides resisting motion, what is a byproduct of friction when two object rub together.
heat
A vertical line on a distance/time graph is...
impossible! you cannot be in two places at once