A car travels 30 miles in 6 hours. What is the speed of the car?
5 mi / hour
100
How do balanced forces affect the motion of objects?
Balanced forces do not change the motion.
100
Define motion.
A change in position compared with a reference point.
100
An object at rest or in motion stays that way until an unbalance force changes it.
1st Law of Motion.
100
It is hard to move a cart full of heavy boxes because it has more...
Intertia
200
An airplane travels 2000 miles from New York to LA in 4 hours. What is the velocity of the airplane?
500 mi / hour, west
200
How do unbalanced forces affect the motion of objects?
unbalance forces change the motion of objects.
200
Wilbur is running on a treadmill on the deck of a cruise ship. Is he changing position compared to the cruise ship?
No.
200
Every action has an equal and opposite reaction.
3rd Law of Motion
200
The amount of air resistance is affected by 2 factors...
Surface Area and Shape. (also, texture)
300
Acceleration is...
A change in velocity.
300
Kip is pulling a wagon west with a force of 85 N.
Skip is pulling the same wagon east with a force of 65 N. What is the Net Force on the wagon?
20 N west.
300
What two forces are alway affecting the motion of object on Earth?
Friction and Gravity
300
Acceleration of an object depends on the force applied and the mass of the object.
2nd Law of Motion
300
When a falling object stop accelerating because of air resistance.
Terminal Velocity
400
Name the 3 ways acceleration can happen...
1. Change in speed.
2. Change in direction.
3. Change in both speed and direction
400
This force always works against motion on earth.
Friction.
400
All objects on earth accelerate at what constant rate?
9.8 m/s/s
400
The tendency of an object to resist a change in motion. The more mass the hard it is to change.
Interia
400
What do we call the measurement of force caused by gravity?
Weight
500
A race cars takes off from the start line. After 10 seconds it is doing 60 mi / hr. What is the car's rate of acceleration? Include the correct units.
6 mi / hr / sec
500
This force accelerates object toward the surface of Jupiter at a constant rate of 25.95 m/s/s.
Gravity
500
Jillian is riding a Merry-Go-Round at constant speed. Which of the following best describes her motion...
- Constant Velocity
- Acceleration
- Gravity and Friction
Acceleration (constant change of direction)
500
A force of 200 N is applied to an object with a mass of 10 kg. What is the acceleration of the object?
20 m/s/s
500
A brick and a feather taken to the Planet Mercury (which is smaller than Earth) will have the same...