Vocabulary
Those Forces are Balanced?
Newton's Laws
What the Graph Doing?
100
What is speed?
A change in distance over time.
100
What is a balanced force?
When forces acting on an object are equal and the object's motion will not change.
100
Define each of Newton's laws.
1st: An object at rest will stay at rest, and an object in motion will stay in motion, unless acted upon by an unbalanced forced.
2nd:An object's acceleration depends on the mass of the object and the net force acting on the object.
3rd:Every action has an equal and opposite reaction.
100
When was the object in the graph moving the slowest? Explain your reasoning.
Between 0-2s, because the graph is the least steep.
200
What is acceleration?
A change in velocity over time.
200
When air hockey pucks slide across an air hockey table, there is little to no friction. The puck moves at a constant speed. When the air hockey puck slides across the table, are the forces balanced or unbalanced?
Forces are balanced, because the puck is moving constantly in a constant direction.
200
I am going on a road trip and I packed my luggage as seen above in the image. I forgot to strap the luggage to the top of the car so when I stopped at a stop sign, all of the luggage fell off of the front of a car. Explain which of Newton's laws explains why this happened.
Newton's 1st Law, because the luggage was in motion, so when the car stopped, the luggage stayed in motion.
200
Which car has the greatest acceleration?
Car C.
300
What is velocity?
A change in distance over time in a certain direction.
300
What is the net force acting on this object, and how will it move?
0N and the object will remain at rest.
300
When pulling up to a stop sign, an eighteen-wheeled truck requires more time to stop than a small electric car. Describe which of Newton's laws applies to this situation and explain why it does.
Newton's second law applies to the situation, because it states that it takes more force to accelerate an object with a larger mass compared to an object with a smaller mass.
300
During which segment(s) was the car stopped?
Segment CD
400
What is inertia?
An object's resistance to changes in motion.
400
What is the net force acting on the object and how will it move?
48N to the right.
400
Michael has been using his truck to help him do yard work. So far, he has used it to move some small tree branches and logs and, with the help of a chain, to pull up some shrubs. When he tried to pull up an old tree stump in his front yard, it wouldn't move. Which of Newton's laws of motion helps us explain why he couldn't move the old tree stump?
For every action, there is an equal and opposite reaction. The stump wouldn't move because the force of the truck pulling on the stump was balanced with the force of the stump pulling on the truck.
400
How is the object in this graph moving?
It has decreasing acceleration (slowing down).
500
Label each of the following units as either speed, velocity, or acceleration:
-Going from 0-25 mph in 3 seconds
-10m/s
-50 km/h west
-A car going a steady 20km/h around a curve.
Acceleration: Going from 0-25 mph in 3 seconds and a car going a steady 20km/h around a curve.
Velocity: 50 km/h west
Speed: 10m/s
500
What is the net forces acting on the object and how will it move?
7N to the left and 2N upward, it will move up and to the left.
500
Based on the above graph, which of the vehicles has the greatest mass?
Vehicle 2, because it requires a greater force and more energy to accelerate compared to the other two.
500
The graph above displays the change in distance between two people running 1 mile. Based on the graph, who won the race and how do you know?
*Note: 1 mile is 1600 meters*
Laney won the race, because she traveled 1600 meters in 5 minutes as opposed to Amy who traveled 1600 meters in 6 minutes.