Grade 12 Dynamics Worksheet
A comprehensive worksheet for Grade 12 Physics students covering key concepts in Dynamics, including Newton's Laws, friction, and forces.
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Grade 12 Dynamics Worksheet
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Read each question carefully and provide clear, concise answers. Show all your work for calculations.
1. Which of Newton's Laws of Motion states that for every action, there is an equal and opposite reaction?
First Law
Second Law
Third Law
Law of Universal Gravitation
2. An object with a mass of 5 kg experiences a net force of 20 N. What is its acceleration?
0.25 m/s²
4 m/s²
15 m/s²
100 m/s²
3. The force that opposes motion between two surfaces in contact is called .
4. According to Newton's Second Law, force is directly proportional to and .
5. An object in motion will stay in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
True
False
6. Static friction is always less than kinetic friction.
True
False
7. Explain the concept of inertia and provide an example.
8. A car is traveling at a constant velocity. What can you say about the net force acting on the car? Justify your answer.
9. A 15 kg block is pulled across a horizontal surface by a force of 45 N. If the coefficient of kinetic friction between the block and the surface is 0.25, calculate the acceleration of the block. (Assume g = 9.8 m/s²)