What does a flat line mean on a distance-time graph?
The object is stopped
100
A force is _________ or ________
a push or a pull
100
What is friction?
A force that opposes motion
100
What is gravity?
A pull on objects down to the earth's core
200
Nicole threw a softball to Megan 30m away. It took 1 second to get to her. What is the speed the ball is traveling?
30m/s
200
This is graphed along the x-axis
Time
200
These two forces are most similar to normal force
Buoyancy and Lift
200
Name the 3 types of friction
Sliding, Rolling, Fluid
200
True/False: Gravity only exists in the earth's atmosphere
False
300
Joe is runs for 0.5 hour at a speed of 6 miles per hour. How far does he run?
3 miles
300
A curved line on a distance-time graph means
the object is accelerating
300
If I have a force of 5 N up and 3 N down, what is my net force?
2 N up
300
The amount of friction between objects depends on these 2 things
The surfaces of each object and the amount of force between them
300
The strength of gravitational pull depends on the mass of objects and _____________________
the distance between them
400
Angel gets on a boat to Jamaica and hangs out there for 6 hours until they get to Jamaica 732 miles away. What is the speed of the boat?
122 miles per hour
400
Graph this: an object travels at a constant speed, stops, then returns home at the same speed
(need to see it)
400
This type of force is exerted in ropes, strings, cords, etc
Tension
400
Fluid friction is also known as what force?
Drag
400
Explain the difference between mass and weight
Mass is constant throughout the universe, weight depends on the strength of the gravitational pull
500
Old Ms Jackson decided to quit her job and run away to Mesquite. She drove at a constant speed of 82 miles per hour and it took her 45 minutes to get there. How far away is Mesquite?
61.5 miles
500
Graph this: an object starts out slow then speeds up until it suddenly stops
(need to see)
500
Name all the forces acting on a person running
Gravity, normal, friction, drag, applied force
500
Name 2 ways to DECREASE friction if you're pushing a couch across the floor (you can't pour oil all over the floor...)
Reduce the weight of the couch, put the couch on wheels, put the couch feet on wax paper, etc
500
Why do you weigh more on Jupiter than on Mercury?
Jupiter's mass results in a stronger gravitational pull toward its core, therefore you weigh more.