Show:
Based on the GRAPH
Speed and Velocity
Weird facts about people in this class
Acceleration/Forces
Newton's Laws
100
Based on the graph, when is the object in motion? (come up and point)
0-25min 70-80min 95-120min 150-165min
100
Which of these is a speed? Which is a velocity? What is the difference? 40 mi/hr 50 m/s 70 km/hr West 10 mi/hr 20 m/s South 1 mm/ms
Speed = 40 mi/hr, 50m/s, 10mi/hr, 1mm/ms Velocity 20m/s South, 70km/hr West Velocity always has a direction attached
100
How many brother/sisters does Ms. Gross have?
3 - 2 sisters/1 brother
100
A car's speed went from 0-60 mi/hr in 10s. What was the car's acceleration?
60-0 = 60/10 = 6m/s/s
100
What is Newton's first law?
An object in motion will stay in motion, an object at rest will stay at rest, unless acted on by an UNbalanced force
200
What is the average speed of the runner during the first 25minutes?
5km/25min = 1/5 km/min = 0.2 km/min
200
Mindy is driving her family to thanksgiving in New York. She drives her car 60mi/hr for 3 hours. How far has she traveled?
60 mi/hr X 3 hrs = 180 miles
200
Who in this class is a twin?
Mindy
200
Use the graph to tell the acceleration of the object?
0-12m/s in 6s = (12-0)/6 = 2m/s/s
200
What is Newton's 3rd law?
For every action there is an equal and opposite reaction.
300
How would you describe the motion from 25-70min?
The object is at rest, stopped, not moving.
300
Julie is driving to Thanksgiving dinner at her parents house. She needs to get there in 0.5 hours. The house is 5 miles away. How fast will she need to drive to get there in time?
5 miles / 0.5 hr = At least 10 mi/hr.
300
Who in this class went to the Final Frontiers competition last weekend and also loves to build with legos?
Favian Torres
300
Which is the best example of balanced forces? apple hanging on a tree ball falling to the ground roller coaster going down a hill marble rolling on a track
apple hanging on a tree because when forces are balanced the object stays at rest (does not slow down or speed up)
300
If the mass of an object is 40kg and it is moving at an acceleration of 2m/s/s. What is its force?
f=ma 40kg X 2m/s/s = 80 Newtons
400
How far did the object travel after 70 minutes?
5 km
400
Marlon wants to race his brother to the turkey table. Marlon runs 50 ft in 2 seconds. His brother runs 50ft in 3 seconds. Who is faster. By how much?
50ft/2s = 25ft/s 50ft/3s = 16.67ft/s Marlon is faster by about 8ft/s
400
Who in this class has a brother or sister that is in 8th grade?
Jordan, Alana, Julie
400
Which of these is the best example of unbalanced forces? apple hanging on a tree roller coaster racing downhill folder sitting on a table car moving at a constant speed
roller coaster racing downhill because the roller coaster is acclerating
400
A person is riding on the bus. All of the sudden the bus comes to a stop and the person lurches forward and almost falls down. Which of Newton's law does this prove?
Newton's 1st law. The man is in motion on the bus. When the bus stops he keeps going because of inertia.
500
What is the average speed of the runner after 120 min
3 km/ 120 min = 1/40 km/min = 0.025 km/min
500
Which animal has the greatest speed: dog 30 meters in 2 sec cat 12 meters in 6 sec human 3 meters in 3 sec
dog 30 meters in 2 sec = 30m/2s = 15m/s
500
Who in this class has a pencil box full of short/stubby pencils?
RC!
500
What is the unit used to measure forces?
NEWTONS!
500
A bullet coming at you has a much greater force than a bowling ball because it is accelerating rapidly. Which of Newton's laws does this prove?
Newton's 2nd law. An object's force is equal to its mass times its acceleration.