General Physics 1 Quiz for Federal University Lokoja

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| By Catherine Halcomb
Catherine Halcomb
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Quizzes Created: 2148 | Total Attempts: 6,845,174
| Questions: 10 | Updated: Apr 22, 2026
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1. What is the dimension of force?

Explanation

Force is defined as mass times acceleration, which can be expressed using the dimensions of mass (m), length (l), and time (t). In the International System of Units (SI), force is measured in newtons (N), where 1 N is equivalent to 1 kg·m/s². Thus, the dimensional formula for force is derived as follows: mass (m) has the dimension of [m], length (l) has the dimension of [l], and acceleration (a) is expressed as [l][t^-2]. Combining these gives the overall dimension of force as [ml1t−2].

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About This Quiz
General Physics 1 Quiz For Federal University Lokoja - Quiz

This assessment focuses on fundamental concepts in physics, including force, energy, and momentum. It evaluates understanding of key principles like Newton's laws and conservation laws, essential for students at Federal University Lokoja. Engaging with this material enhances comprehension of vital physics topics, preparing learners for advanced studies.

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2. Which of the following is a scalar quantity?

Explanation

Mass is a scalar quantity because it has magnitude but no direction. Unlike force, velocity, and acceleration, which are vector quantities and require both magnitude and direction for their complete description, mass simply quantifies the amount of matter in an object. It is expressed in units such as kilograms or grams and does not change based on the object's position or movement in space.

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3. What is the formula for gravitational potential energy?

Explanation

Gravitational potential energy (PE) is the energy an object possesses due to its position in a gravitational field. The formula PE = mgh expresses this relationship, where 'm' is the mass of the object, 'g' is the acceleration due to gravity, and 'h' is the height above a reference point. This formula indicates that the potential energy increases with greater mass and height, reflecting how much work is required to lift the object against the force of gravity.

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4. What does Newton's second law state?

Explanation

Newton's second law establishes the relationship between force, mass, and acceleration. It states that the acceleration of an object is determined by the net force acting on it, meaning that greater forces will result in greater acceleration, while the mass of the object resists this acceleration. This principle can be summarized by the equation F = ma, where F is the net force, m is the mass, and a is the acceleration. Thus, it highlights how force influences motion, making it fundamental to understanding dynamics in physics.

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5. What is the unit of work?

Explanation

Work is defined as the energy transferred when a force is applied over a distance. In the International System of Units (SI), the unit of work is the joule. One joule is equivalent to the work done when a force of one newton moves an object one meter in the direction of the force. This relationship highlights the connection between force, distance, and energy, making the joule the standard unit for measuring work in physics.

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6. Which of the following quantities is conserved in an elastic collision?

Explanation

In an elastic collision, both momentum and kinetic energy are conserved. Momentum conservation arises from the principle of conservation of linear momentum, which states that in a closed system, the total momentum before the collision equals the total momentum after. Similarly, in elastic collisions, the total kinetic energy of the system is also conserved, meaning that the sum of the kinetic energies of the colliding objects before the collision equals the sum after. This distinguishes elastic collisions from inelastic ones, where kinetic energy is not conserved.

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7. What is the moment of inertia of a point mass?

Explanation

The moment of inertia of a point mass is calculated using the formula \( I = mr^2 \), where \( m \) is the mass of the object and \( r \) is the distance from the axis of rotation. This formula reflects how the distribution of mass relative to the axis affects rotational inertia; the farther the mass is from the axis, the greater the moment of inertia. Thus, it captures both the mass and its position, indicating that increasing either will increase the resistance to rotational motion.

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8. What is the escape velocity from the Earth?

Explanation

Escape velocity is the minimum speed needed for an object to break free from a celestial body's gravitational pull without further propulsion. For Earth, this velocity is approximately 11.2 km/s. This value is derived from the gravitational force and the mass of the Earth, taking into account the radius from the center of the Earth to the point of escape. At this speed, an object can overcome Earth's gravity and enter space.

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9. What is the principle of conservation of momentum?

Explanation

The principle of conservation of momentum states that in a closed system, where no external forces are acting, the total momentum before any interaction (such as a collision) will equal the total momentum after the interaction. This means that the momentum is conserved, regardless of whether the collision is elastic or inelastic. This principle is fundamental in physics, as it applies to various scenarios, including collisions and explosions, ensuring that the total momentum remains unchanged in the absence of external influences.

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10. What is the angular momentum of a particle?

Explanation

Angular momentum of a particle is defined as the product of its moment of inertia (I) and its angular velocity (ω). This relationship captures how the distribution of mass (moment of inertia) and the rate of rotation (angular velocity) contribute to the overall rotational motion of the particle. In contrast, the other options represent linear momentum (mv), rotational inertia (mr²), and torque (Fτ), which are not directly related to angular momentum in its standard form. Thus, Iω is the appropriate expression for angular momentum.

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What is the dimension of force?
Which of the following is a scalar quantity?
What is the formula for gravitational potential energy?
What does Newton's second law state?
What is the unit of work?
Which of the following quantities is conserved in an elastic...
What is the moment of inertia of a point mass?
What is the escape velocity from the Earth?
What is the principle of conservation of momentum?
What is the angular momentum of a particle?
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