STAAR Cat 2

The 3 vehicles are all traveling at a speed of 50 m/s, but only the pick up truck has a changing velocity. Why?

• Because the truck can accelerate faster than the other 2 vehicles.

• Because the truck is traveling in the opposite direction from the other 2.

• Because the truck is traveling on a curve of the road

• Because the truck needs a large amount of force to move.

7.7A

• A student sitting in a chair holding both boxes.

• A student holding the large box 1 m above the floor.

• A student standing and holding the small box.

• A student lifting the small box .5 m from the floor to the table.

Two cars with different masses travel at the same speed down a hill toward a stop sign. What will happen when both cars apply the brakes at the same time to stop?

• The car with the smaller mass will require less force to stop than the car with the larger mass.

• The car with the larger mass will maintain its velocity while traveling down the hill.

• The car with the smaller mass will take longer to stop than the car the car with the larger mass.

• The car with the larger will have less inertia than the car with the smaller mass.

6.8A In the classroom demonstration shown, a rubber ball is dropped from Position 1. The ball bounces as shown. At which position does the ball have the greatest kinetic energy?

• Position 1

• Position 2

• Position 3

• Position 4

What is speed?

• how far you go

• how much distance is covered over a period of time

• how fast you accelerate

• the change in the location of a object

What is velocity?

• the quickness of an object

• the location of an object

• acceleration

• speed in a specific direction

If you go 10 meters in 5 sec. how fast are you going

• 5mps

• 2 mps

• 6mps

• 8mps

Changes in our speed, direction or both are called _________.

• gravity

• changes

• acceleration

• deceleration

The picture of the position vs. time graph shows an object that is...

• accelerating/speeding up

• moving at a constant speed

• not moving

• accelerating/slowing down.

4 students raced toy cars on a track. The mass and the acceleration of each car is shown in the table. Which car had the greatest force applied?

• 1

• 2

• 3

• 4