Title: Mr. Nye
1The 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.
6Motion 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
11Change 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