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A2
m1-2 science

20 - Newton's Second Law

Title

Newton's Second Law

Reading Text

Newton's Second Law explains how force, mass, and speed work together. It uses a famous formula: F=ma. This means Force equals Mass times Acceleration. Mass is how much matter is in an object. It is like weight. Acceleration is when something starts to move faster. Think about a shopping cart. If the cart is empty, it is light. You can push it easily, and it goes fast. If the cart is full of heavy food, it has more mass. You must push harder to make it move. More force makes things speed up faster.

Activities

Vocabulary

Definitions:
  • Text: A math rule written with symbols.
  • Text: To go faster and faster.
  • Text: How much matter is in an object.
  • Text: Having a lot of weight; difficult to lift.
  • Text: Having little weight; easy to lift.
Items:
  • Label: Formula
    Answer: A
  • Label: Acceleration
    Answer: B
  • Label: Mass
    Answer: C
  • Label: Heavy
    Answer: D
  • Label: Light
    Answer: E
Fill In The Blanks:
  • Before: F=ma is a famous
    After: in science.
    Answer: formula
  • Before: A truck has more
    After: than a bicycle.
    Answer: mass
  • Before: When you run faster, that is
    After: .
    Answer: acceleration
  • Before: It is hard to lift the
    After: box.
    Answer: heavy
  • Before: A feather is very
    After: .
    Answer: light
Scrambled:
  • Text: to be generated
    Answer: Force equals mass times acceleration.
  • Text: to be generated
    Answer: The empty cart is light.
  • Text: to be generated
    Answer: You must push the heavy cart.
  • Text: to be generated
    Answer: More force makes it go faster.
  • Text: to be generated
    Answer: Mass is like weight.

Comprehension

Questions:
  • Text: The formula for the Second Law is F=ma.
    Answer: true
  • Text: Mass is how fast something goes.
    Answer: false
  • Text: It is easier to push an empty cart than a full one.
    Answer: true
  • Text: If you push harder, the object slows down.
    Answer: false
  • Text: Heavy objects need more force to move.
    Answer: true

Written Expression

Questions:
  • Text: Why is it harder to push a broken car than a broken bicycle?
  • Text: What happens if you kick a ball very hard?
Examples:

Examples:

  • The car has more mass, so I need more force to move it.
  • If I kick the ball hard, it accelerates very fast.

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