Definitions
Word Problems
Acceleration
Force
Newton's Laws
100
The distance between the starting and final position.
What is displacement
100
. If a car travels 400m in 20 seconds how fast is it going?
What is a 20 m/s
100
This is the rate at which velocity changes
What is acceleration
100
The combination of all forces on an object.
What is net force
100
Equal forces acting on an object in opposite directions are described as this
What is balanced
200
A push or a pull
What is a force?
200
An ambitious hiker walks 25 km west and then 35 km south in a day. What is his displacement?
What is 10 km south?
200
These are two ways object can accelerate
What is change in speed or change in direction
200
Forces on an object if net force is zero.
What are balanced forces
200
This law of motions states "An object at rest stays at rest, and object in motion stays in motion"
What is Newton's 1st Law of Motion
300
The difference between speed and velocity involves this
What is direction
300
How much force is needed to accelerate a 66 kg skier at 2 m/sec2?
What is 132 N?
300
These must be known to calculate acceleration.
What is the change in velocity (final velocity - initial velocity) and time
300
A force when two objects are touching.
What are contact forces
300
The tendency of an object to resist a change in motion is called this
What is inertia
400
How far an object travels at any one time.
What is distance
400
What is the speed of a horse that runs 21 meters in 3 seconds?
What is 7m/s?
400
This is the unit for acceleration
What is m/s/s or m/s^2
400
Forces on an object when the net force isn't zero.
What is an unbalanced force
400
This law of motions states "The acceleration of an object is equal to the net force put on it by its mass"
What is Newton's 2nd Law of Motion
500
This is the rate at which velocity changes
What is acceleration
500
If a runner has a speed of 3 m/s and ran for 50 seconds, how far did she run?
What is 150 m?
500
A car can accelerate from rest to 25 m/s in 9 seconds. What is its acceleration?
What is 2.78 m/s^2
500
What is the net force on this object?
What is 5 N to the right?
500
This law of motions states "For every action there is an equal and opposite reaction"
What is Newton's 3rd Law of Motion