Worksheet: Newton's Three Laws of Motion
Part 1: Understanding Newton's Laws
1. First Law of Motion (Law of Inertia): Fill in the blanks to complete the statement.
Newton's First Law of Motion states that an object at rest will stay at rest, and an
object in motion will stay in motion at a constant speed in a straight line unless acted
upon by an _______________ force.
2. Second Law of Motion (Law of Acceleration): Define the formula for Newton's Second
Law of Motion.
Formula: _____________ (F) = _______________ (m) x _______________ (a)
3. Third Law of Motion (Law of Action and Reaction): True or False? When one object
exerts a force on another object, the second object exerts an equal and opposite force
on the first object. _______
Part 2: Applying Newton's Laws
1. Scenario Analysis: For each of the following scenarios, identify the Newton's Law of
Motion (1st, 2nd, or 3rd) that applies.
a) A soccer ball is kicked with a certain force and accelerates forward. __________
b) A book is lying on a table and remains at rest. __________
c) A rocket launches into space by expelling exhaust gases downwards. __________
d) Two students on skateboards push each other apart. __________
2. Calculating Force: Calculate the force required to accelerate an object with a mass of
10 kg at an acceleration of 2 m/s².
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3. Action and Reaction: Think of two examples from daily life that illustrate Newton's
Third Law of Motion (Action and Reaction). Describe the action and the corresponding
reaction in each case.
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Part 3: Real-life Applications
1. Safety Measures: Explain how Newton's First Law of Motion (Law of Inertia) is related
to wearing seatbelts in cars. Why is it essential to wear seatbelts for safety?
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2. Designing Rocket Propulsion:
How does Newton's Third Law of Motion play a vital role in the design of rocket
propulsion systems? Explain the principle behind it.
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Conclusion: In a few sentences, summarise Newton's Three Laws of Motion and how they
help us understand the behaviour of objects in motion.
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