Mr. Nye

1

The Mans PSSA Practice
2

• What change could be made in the setup in
  diagram 1 to increase the amount of force
  necessary to move the block of wood?
• Add mass or weight to the block, roughen the
  surface of the table or the bottom of the block,
  increase the surface area of the wood, etc.

3

• Explain why round pencils in diagram 2 decrease
  the amount of force necessary to move the block
  of wood.
• Pencils reduce friction, the pencils roll
  instead of slide, pencils serve as wheels.

4

• Which diagram best represents the correct
  reading for the same spring scale being used to
  weigh a 200 g mass?
• Choice 2

5

• Which satellite would experience the strongest
  pull of Earths gravity? State the scientific
  principle that explains your answer.
• A, b/c as its closer so the gravitational pull
  is stronger b/c as distance decreases, the
  gravitational pull is stronger.

6
Motion for 500

• Predict what might happen to satellite B if the
  forces acting on it become unbalanced.
• It will move into a new orbit.
• It will crash into Earth.
• It will escape from its orbit.

7

• A student goes skateboarding a few times a week.
  The student notices that she can go faster while
  skating on some level surfaces than on others.
  She hypothesizes that speed has something to do
  with the surface she is skating on. The student
  wants to design an experiment to test this
  hypothesis.
• a Identify the independent (manipulated)
  variable in the experiment.
• Surface or surface material
• b Identify the dependent (responding) variable
  in the experiment.
• Speed or skateboard speed

8
A student goes skateboarding a few times a week.
The student notices that she can go faster while
skating on some level surfaces than on others.
She hypothesizes that speed has something to do
with the surface she is skating on. The student
wants to design an experiment to test this
hypothesis. Identify two factors that will need
to be held constant in the experiment. Same
skateboard Same person Same wheels Air
temperature Level surface Wind speed Wind
direction Equal push Equal distance Placement of
person on the skateboard
9

• What is the relationship between the mass of the
  planets and the relative strength of their
  gravitational pull?
• As mass increases, the gravitational pull/force
  increases OR its a direct relationship

10

• Which 3 planets have less gravitational pull
  than Earth?
• Mercury, Mars, Pluto

11
Change to Materials Effect this Change Will Have on theDistance the Wooden Platform Moves
Shorten the string to stretch the rubber band. decrease increaseremain the same
Use a wooden platform that has a greater mass. decrease increaseremain the same
Remove the pencils from under the wooden platform. decrease increaseremain the same
Use scissors to cut the string instead of burning it with a match. decrease increaseremain the same