Physics quiz

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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


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