Basics of Motion
Characters of Motion
Forces
Acceleration and Misc.
Newton's Laws
100
Define the term "motion."
An object changing position with regards to a reference point.
100
Name the formula for speed.
speed=distance/time s=d/t
100
If an object has balanced forces acting on it, what can be said about the object?
It is at rest or traveling at a constant speed in a straight line.
100
Define the term "Unbalanced Force."
It forces others so object in motion.
100
Define Newton's first law of motion.
An object in motion or an object at rest will remain as such until acted on by an outside force.
200
How do you know if an object has changed position?
If it moved with regard to the reference point.
200
Define the term "velocity."
velocity= speed + direction
200
How does friction affect the motion of an object?
It works in the opposite direction of applied force to slow the object down .
200
If a sled speeds up from 5 km/s to 15 km/s while traveling downhill for 5 seconds, what is the acceleration of the sled?
Acceleration: 2km/s squared
200
An NFL kicker kicking a football is an example of which of Newton's Laws of motion?
2nd Law
300
A bus is traveling around town. It travels 5km N, 10km E, 5 km S, and finally 5km W. What is the distance traveled by the bus?
distance=25 km
300
If a car has traveled 240 miles in 4 hours, what is the average speed of the vehicle during the trip?
s=d/t 240 mi/4 hrs =60 mph
300
The force of gravity always acts in what way on an object on earth?
It pulls it down.
300
Explain the difference between positive acceleration and negative acceleration.
Positive is speeding up, and negative is slowing down.
300
If a car abruptly stops and the passenger isn't wearing a seatbelt, what will happen to the passenger? What law of motion does this demonstrate?
The passenger will continue to move forward at the same speed, hitting their head on the dashboard or windshield, and possibly through it. The 1st Law of motion. *****ALWAYS WEAR YOUR SEATBELT!!!!!!!!!!!!!!!!*****
400
Name a reference point used to determine the motion of opening a locker.
floor, wall, ceiling, other lockers
400
If a train has an acceleration of -5 km/s2, describe the motion of the train.
Train is slowing down or negatively accelerating.
400
If a mother is pushing a shopping cart around a store, name the force coming from the mother, acting on the shopping cart.
applied force
400
Explain what a normal force is and how it acts on an object.
It counteracts gravity by pushing up from the surface of an object.
400
Define Newton's second law of motion AND give an example.
The acceleration of an object is directly proportional to the force acting on it. Ex: the harder you throw a ball, the farther it will go.
500
A bus is traveling around town. It travels 5km N, 10km E, 5 km S, and 5km W. What is the displacement of the bus?
displacement=5km East
500
Compare speed and acceleration.
Speed is a measurement of d/t. Acceleration is a change in speed/t. Both deal with d/t and both are effects of motion.
500
On a white board, draw the 4 forces involved in the motion of a car traveling downhill.
F A N G
500
If an object has zero acceleration, does it also have zero speed?
No, because it could be in motion and not changing speed. Speed is not zero, but acceleration is.
500
If two people who are running, run into each other at full speed, what will happen. Which Law does this demonstrate?
They will fall backwards, in the opposite direction of each other. The 3rd Law
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