Grade 9 Dynamics Worksheet
A worksheet for Grade 9 Science students covering fundamental concepts of Dynamics, including Newton's Laws of Motion, forces, and their effects.
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Grade 9 Dynamics Worksheet
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Read each question carefully and answer to the best of your ability. Show all your work for calculation questions.
1. Which of Newton's Laws states that an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force?
Newton's First Law
Newton's Second Law
Newton's Third Law
Law of Conservation of Energy
2. What is the unit of force in the International System of Units (SI)?
Joule (J)
Watt (W)
Newton (N)
Kilogram (kg)
3. The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its .
4. For every action, there is an equal and opposite .
5. A heavier object always falls faster than a lighter object in a vacuum.
True
False
6. Friction is a force that opposes motion between two surfaces in contact.
True
False
7. A car with a mass of 1200 kg accelerates at 2 m/s². Calculate the net force acting on the car.
8. Explain the concept of inertia and provide an example.
Match each term on the left with its definition on the right.
9. Mass
a. The force of gravity acting on an object.
10. Weight
b. The amount of matter in an object.
11. Force
c. A push or a pull that can change an object's motion.