Laws of Motion
Which law of motion states: Force equals mass times acceleration
Newton's 2nd Law of Motion
What makes velocity different than speed?
Velocity is speed in a certain direction
Force always has...
Magnitude (size) and direction
What is the equation for speed
Speed = Distance / Time
What was the score of the England v France game?
4 (France) to 6 (England)
What law of motion is also known as the law of inertia?
Newton's 1st Law of Motion
What is the formula for acceleration
Acceleration = Final Velocity - Initial Velocity / Time taken for change
or
Vf - Vi / t
Name the three types of forces discussed in class.
What is a fixed point or frame of reference when it comes to movement?
The point where the object started moving from.
Which long lost twins reunited at ASM yesterday?
Evil King and Evil king's brother
Use the 2nd Law of motion, solve for acceleration:
Ms. Jasper is pushing her 8th grade students in a shopping cart with a force of 10,000 N. The combined weight of all her students is 2,500 kg. What is the acceleration in meters per seconds squared
4 m/s2
What is the unit used most often for acceleration
meters per second squared (m/s2)
What does "contact force" mean?
A contact force is one where two surfaces must be in contact for force to be exerted.
An endurance athlete runs at a steady speed of 12km/h for exactly 45 minutes. How many meters did the athlete run?
9,000 meters (9 km)
What is one sport that Jasper has played?
Flag football, Basketball, Track
Define Inertia.
Matter's resistance to change in motion (it wants to stay where its at)
Acceleration is a change in...
Speed, Direction, or Both
Define Net Force.
Net Force is the combination of all the forces acting on an object.
Draw the distance triangle used to solve speed equation
Did u?
Points will go to whichever group finds the most unique thing they all have in common.
Who?
Using the second law of motion, solve.
A firefighter is pulling a 20 kg supply sled across a rough, snowy road. The firefighter pulls forward with a force of 80 N. The rough snow produces a opposing frictional force of 20 N.
1. What is the net force acting horizontally on the sled?
2. Calculate the acceleration of the sled.
1. 60 N
2. 3 m/s2
A high-speed train is traveling at a constant speed of 90km/h. The engineer sees a signal ahead and applies the brakes, bringing the train to a complete stop in 5 seconds. What is the train's acceleration?
-5m/s2
Name and identify three types of friction.
Kinetic/Sliding Friction, Static Friction, Rolling Friction, Fluid Friction
A train travels at a constant speed of 90 km/h. How many meters does it travel in 12 minutes?
25km/h