Podcast
Questions and Answers
What is the formula for calculating the force exerted by a spring?
What is the formula for calculating the force exerted by a spring?
- $F = k + x$
- $F = \frac{k}{x}$
- $F = kx$ (correct)
- $F = \frac{x}{k}$
What happens to the gravitational force between two objects when the distance between them is doubled?
What happens to the gravitational force between two objects when the distance between them is doubled?
- It doubles
- It quadruples
- It becomes half (correct)
- It remains the same
What is the SI unit of electric current?
What is the SI unit of electric current?
- Volt
- Coulomb
- Ohm
- Ampere (correct)
Which of the following statements about concave mirrors is true?
Which of the following statements about concave mirrors is true?
Flashcards
Hooke's Law
Hooke's Law
The force exerted by a spring is directly proportional to its displacement from its equilibrium position. This means that the more the spring is stretched or compressed, the greater the force it exerts.
Gravitational Force and Distance
Gravitational Force and Distance
The gravitational force between two objects is inversely proportional to the square of the distance between them. This means that if you double the distance, the force becomes four times weaker.
SI unit of electric current
SI unit of electric current
The SI unit of electric current is the ampere (A). It measures the rate of flow of electric charge. One ampere is equal to one coulomb of charge passing a point in one second.
Concave Mirrors
Concave Mirrors
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Study Notes
Forces and Springs
- The formula for calculating the force exerted by a spring is F = kx, where F is the force, k is the spring constant, and x is the displacement from the equilibrium position.
Gravitational Force
- When the distance between two objects is doubled, the gravitational force between them is reduced to one-quarter of its original value.
Electric Current
- The SI unit of electric current is the ampere (A).
Mirrors
- A true statement about concave mirrors is: [awaiting specific statement]
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Description
Test your knowledge of physics concepts including spring force calculation, gravitational force, SI unit of electric current, and properties of concave mirrors in the ICSE class 9 curriculum.
