Physics quiz
If there are two forces going in the same direction how would you find the net force?
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Which best describes Alex's data? https://quizizz.com/_media/questions/L2FwcGhvc3RpbmdfcHJvZC9ibG9icy9BRW5CMlVyY20zRWtMQW9nYmMzOEM2Q2VmQlVHalAzZTUwQUtwQmFKMEZFenBJbGROUzNlOTVGVW5PQ21wOUc0LVNhSnlmMzF5NERtTTRmUXlmOUNSWFYyYmxvU2Q3Q19GVzdDd2pwV2haLThXNHBhSFhhZnl4ay5KZ2czVVUxcGhCbzZxQ1Fh_400_400
Alex was stopped in the last 40 sec
A runner races in the 100 meter dash. It takes her 10 seconds to finish. What is her average speed?
Average speed = total distance total time
What does this graph represent? https://quizizz.com/_media/questions/L2FwcGhvc3RpbmdfcHJvZC9ibG9icy9BRW5CMlVvczZjQl9sc2ViWDNLVlRBUkVaVEpOSy1SQnExQmstWWhDdHFzUXJ3bUtab0JwZFFFZlpNcEozRWw2RmplSWZaMURuaXc3dWF2a0kzRTZ3V0VOclZsYXVoYndvUS53Z19waHUxWmJuLUh1MHUt_900_900
Constant Speed
What is Normal Force?
Force applied back to the object against gravity
Why does a car accelerate as it round a corner at a constant speed?
Its direction changes
The Law of Inertia
Newton's 1st Law of Motion
As the fuel in a rocket ignites, the force of gas expansion and explosion pushes out the back of the rocket and pushes the rocket forward.
Newton's 3rd Law of Motion
What is happening at E? https://haygot.s3.amazonaws.com/questions/1055147_615fb8a574a247b1a670cada6294a3d7.JPG
Steady speed; returning to start position
People get energy from the food that they eat and transform that energy as they move. Which energy transformations occur as a student rapidly rubs the palms of his hands together?
chemical to mechanical to thermal
What information does a velocity give that a speed does not give?
direction
The force operative in braking a vehicle is
friction
What two factors do you need to calculate density?
mass and volume
2 objects traveling at the same speed have different velocities if they...
move in different directions
A lead ball falls through water more slowly than through air because
of the viscous force in water
What is the unit for angular velocity?
rad s-1
What is the unit for angular acceleration
rad s-2
What is velocity?
speed in a specific direction
What is a force?
the PUSH or PULL on an object
What is the net force? https://91b6be3bd2294a24b7b5-da4c182123f5956a3d22aa43eb816232.ssl.cf1.rackcdn.com/contentItem-3641114-21219209-6fjb99d32ivs7-or.jpg
3 N Right
A rod rotates about a pivot at its center at 2 rads/s. Its angular velocity increases to 14 rads/s in 3 s. Find the rod's angular acceleration
4 rad/s/s
A ball attached to a string and rotates in a circle. If it takes 1.00 s to complete one revolution, what is the angular velocity of the ball?
6.28 rad/s
You and your dad are moving the couch from one side to another. Your dad pushes with a force of 35 N to the right and you push with a force of 25 N right. What is the net force on the couch?
60 N right
Which graph shows an object that is not moving? https://o.quizlet.com/W97GJ8tsK2Hwd0oXnNZIDw_b.jpg
A
The rate at which velocity changes is called
acceleration
In the graph, two objects are racing. Which object would win the race? https://quizizz.com/_media/quizzes/d0175250-0c79-4acb-8509-7fa772b022e8_400_400
blue
