กิจกรรม STEM สำหรับนักเรียนชั้นมัธยมศึกษาปีที่ 3 รร.สาธิตมหาวิทยาลัยศิลปากร

1. Name ____________________________ Mods ____________ Date__________
Newton’s SecondLawof Motion Virtual Lab
In this Virtual Lab you will investigate the relationship between mass,
acceleration, and forceby experimenting with falling objects of various masses
under a rangeof gravitational conditions.
Objectives:
1. Relate Newton’s second law of motion to the effect of gravity on falling
objects.
2. Determine the effect of mass on the acceleration rate of falling objects.
3. Observethe effect of gravitational conditions on the rate at which objects
of identical mass fall.
4. Given mass and acceleration, compute force.
Vocabulary:
Force
SI unit for force:
Net force
Acceleration
Newton’s secondlawof motion:
The formula for calculating a forceon an object:

2. Mass
Weight
Procedure:
Note: This activity assumes there are no atmospheric resistance, pressure, or
temperature effects.
1. Go to the link:
http://www.glencoe.com/sites/common_assets/science/virtual_labs/E25/E
25.html
2. Click arrow under Location 1 and select a planet to test. Click the arrow
under Object 1 and select an object to test. Record the gravitational rate of
acceleration for this location and the mass of the object in the table.
3. Select a second planet and objectunder Location 2 and Object 2. Record
the gravitationalacceleration for this location and the mass of the objet in
the table.
4. Click the Drop button and observethe two objects as they fall. Click the
Drop button again to see the objects to fall again. The lines following a
falling object indicate the object’s relative position during each second of
acceleration.
5. Using the mass and acceleration data displayed on the monitors, calculate
the force(weight) of both objects. Record your results in the table.
6. Repeat the abovesteps two more times with other objects and locations.
Click Reset button to clear the screen.
7. Complete lab questions and conclusion.

3. Table:
Location Acceleration
(
𝑚
𝑠²
)
Object Mass of
Object (kg)
Weight of
Object (N)
Calculation.
Calculate the weight of different object. Compare one to another:
Write the formula, substitutewith units, and final answer with units.

4. Questions (Pleasewriteyour responses in complete sentences):
1. According to Newton’s second law of motion, a net force on an object will
causeit to accelerate. How does the Newton’s law relate to the forceof
gravity?
2. How does the force of gravity affect the rate of acceleration?
3. Describewhat happens when identical objects are dropped under different
gravitational conditions.

5. 4. Describewhat happens when objects of different mass are dropped under
the samegravitational conditions.
5. What is weight? What is mass? How aremass and weight different?
6. Based on your experience with the experiments, how does mass affects
weight?
Conclusion: