Potential and Kinetic Energy
Balanced and Unbalanced Forces
Calculating Speed
Net Force
Motion Graphs
100
Which type of energy is stored energy?
Potential energy
100
What is the unit for force?
Newtons
100
What do you have to do to calculate speed?
Speed = distance/time, you must divide the distance by the amount of time
100
If the forces are going in opposite directions, what do you do to the two numbers?
Subtract the forces to see how much is left
100
On a motion graph, a flat line means what?
No motion or the object has stopped
200
At which point does the cart have the most potential energy?
Point a
200
What will happen to an object when two balanced forces are acting upon it?
There will be no movement/motion
200
A golf ball is hit a distance of 200 yards in 5 sec. What is the speed of the golf ball?
40 yards per second
200
What is the Net Force?
70 N to the right
200
What distance had the object gone after 4 minutes?
800 meters
300
What is thermal energy?
Heat
300
Which could be an example of an unbalanced force?
A plate sitting on a dining table
A ball at the top of a hill that is not moving
Earth orbiting the Sun
A baseball that has been thrown to home plate.
A baseball that has been thrown to home plate.
300
A student on the track team can run 70 meters in 25 seconds. What is the student’s average speed?
2.8 meters per second
300
What will the net force be on the object below?
15 N up
300
After how many minutes did the object start returning to the starting position?
At 30 minutes
400
What would have the greatest kinetic energy?
A car driving down a hill
A person running down a hill
A ball rolling down a hill
A bowl of cereal on the table
A car driving down a hill
400
How will the object move?
It will not move
400
Nikki has to travel a total of 351 miles. She travels the first 216 miles in 4 hours. What is her speed for the first part of the journey?
54 miles per hour
400
You and your friend are moving a couch from one side to another. Your friend pushes with a force of 35 N to the right and you push with a force of 25 N right. What is the net force on the couch?
50 N to the right
400
20 seconds
500
What two things does kinetic energy depend on?
Mass and speed
500
Give an example of an unbalanced force
That's right!
500
A train travels 25 km in .5 hrs. How fast is the train going?
50 km/hr
500
What is the net force?
170 N to the Right
500
What is the total distance travelled by the object over the entire journey?
80 meters