Grade 8 Science
Name:
Section:
Activity No.
Activity Title:
Date:
Score:
1a
Law of Inertia
I. Learning Experiences
A. Activity
Directions: Answer the following.
Part 1.
1. Which of the two below has a greater mass? Greater inertia? Needs more force to move?
A
B
http://www.buildingspeed.org/blog/category/materials/asphalt/
Objects at rest remain at rest unless acted on by a net force.
Greater mass:
Greater Inertia:
More force needed to move:
2. Which among the two is hard to change in velocity? Hard to stop?
A
B
http://www.buildingspeed.org/blog/category/materials/asphalt/
Objects in motion remain in motion in a straight line (unless
acted upon by an outside force)
Hard to change in velocity:
Hard to stop:
3. A bus is moving at constant speed. A passenger drops a coin vertically down. Where would the coin would
likely to drop? a) Before him. b) Just below his feet or c) after him? Why?
Direction of train’s movement at constant
velocity
a
b
c
Coin would fall on:
Part II.
The passenger in the bus is standing upright. Answer the following questions.
1. What happens to the passenger when the bus suddenly moves? What is the direction of the bus and
what is the direction of the passenger’s movement?
2. What happens to the passenger if the moving bus at constant velocity suddenly stops? What is the
direction of the passenger’s movement and of the car?
3. Does the passenger obey the law of inertia? Explain.
C. Framing Concepts
Directions: Complete the figure below.
Statement:
Example:
Law of
Inertia
Relation of inertia
and mass:
Application: