General scientific laws in motion force pressure and energy. - One Line Questions

1. The formula for rotational kinetic energy is: — 1/2 Iω²
2. The unit 'bar' is often used to measure pressure. 1 bar is equal to: — 100,000 Pascals
3. Atmospheric pressure is caused by the weight of the air above a given point. At sea level, the average atmospheric pressure is approximately: — 101.3 kilopascals
4. Pressure is defined as force per unit area. If a force of 100 Newtons is applied to an area of 0.5 square meters, what is the pressure exerted? — 200 Pascals
5. Newton's Third Law of Motion states that for every action, there is an equal and opposite reaction. Which of the following is an example of Newton's Third Law? — A rocket expelling gas to propel itself upwards
6. Pascal's Principle states that a change in pressure applied to an enclosed fluid is transmitted undiminished to every portion of the fluid and the walls of the containing vessel. This principle is the basis for: — Hydraulic systems
7. The pressure exerted by a liquid in a container is dependent on the depth of the liquid and its density. This is described by: — Hydrostatic Pressure Formula
8. Impulse is equal to the: — Change in momentum
9. A lever is a rigid bar that pivots around a fixed point called a fulcrum. Levers are classified into three classes based on the relative positions of the effort, load, and fulcrum. Which class of lever has the fulcrum between the effort and the load? — Class 1 lever
10. The principle of moments states that for a body to be in rotational equilibrium, the sum of the clockwise moments about a pivot must be equal to the sum of the: — Counter-clockwise moments
11. The Law of Conservation of Energy states that energy cannot be created or destroyed, only transformed from one form to another. In a closed system, the total energy remains: — Constant
12. Which of the following is a correct statement about energy transformation? — All of the above.
13. The rate of doing work is defined as: — Power
14. Which of the following statements about energy is correct? — Energy can be converted from one form to another.
15. Newton's Second Law of Motion states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. What is the mathematical formula that represents this law? — F = m * a
16. Centripetal force is the force that acts on a body moving in a circular path and is directed towards the center of the circle. Its formula is: — Both A and B
17. When a force is applied to a system, and the system does work, the force is doing work. If the system does no work, the force is doing no work, even if it is applied. This is a consequence of the definition of work as: — Force multiplied by displacement in the direction of the force
18. The constant of proportionality in Newton's Law of Universal Gravitation is: — G (Universal Gravitational Constant)
19. A body will float in a fluid if its average density is: — Less than the density of the fluid
20. Centrifugal force is often described as an outward force experienced by an object moving in a circular path. In reality, it is a fictitious force due to: — Inertia of the object
21. The mechanical advantage (MA) of a simple machine is the ratio of: — Output force to input force
22. A machine is said to be 100% efficient if: — Its output work is equal to its input work.
23. What is the SI unit of force? — Newton
24. Power is the rate at which work is done or energy is transferred. What is the SI unit of power? — Watt
25. Kinetic energy is the energy an object possesses due to its motion. What is the formula for kinetic energy? — KE = 1/2 mv²
26. Momentum is defined as the product of an object's mass and its velocity. What is the SI unit of momentum? — kg m/s
27. Inertial mass and gravitational mass are generally considered to be equivalent, a concept known as the: — Equivalence Principle
28. A simple machine that consists of a grooved wheel on an axle or shaft, around which a rope, chain, or belt passes, is called a: — Pulley
29. When a body is rotating, the energy it possesses due to its rotation is called: — Rotational kinetic energy
30. The unit of angular velocity is typically: — Both B and C
31. According to Newton's First Law of Motion, an object at rest will stay at rest, and an object in motion will continue in motion with constant velocity, unless acted upon by an external force. This property of matter is known as: — Inertia
32. The unit of the Universal Gravitational Constant (G) is: — N m²/kg²
33. What is the SI unit of pressure? — Pascal
34. Which of the following is a fundamental unit of energy in the SI system? — Joule
35. Torque is the rotational equivalent of linear force. It is calculated as the product of force and the perpendicular distance from the pivot to the line of action of the force. What is the SI unit of torque? — Newton-meter (N m)
36. The gravitational force between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers. This is described by: — Newton's Law of Universal Gravitation
37. The unit of power, Watt, is defined as: — One Joule per second
38. A spring stores elastic potential energy when it is compressed or stretched. The formula for the potential energy stored in a spring is: — PE = 1/2 kx²
39. Potential energy is the energy stored by an object due to its position or state. Gravitational potential energy is given by the formula: — PE = mgh
40. Friction is a force that opposes motion between surfaces in contact. Which type of friction is generally the strongest? — Static friction
41. When a solid object is immersed in a fluid, it experiences an upward buoyant force. If the buoyant force is greater than the weight of the object, the object will: — Float
42. When an object falls freely under gravity, neglecting air resistance, its acceleration is constant and is known as: — Gravitational acceleration
43. The Second Law of Thermodynamics introduces the concept of entropy. Entropy is a measure of: — The order or randomness of a system
44. What is the concept of impulse in physics? — The product of force and the time interval over which it acts
45. The work done by a force is zero if: — All of the above
46. Bernoulli's Principle relates the pressure, speed, and elevation of a moving fluid. It states that for an inviscid flow, an increase in the speed of the fluid occurs simultaneously with a decrease in pressure or a decrease in the fluid's potential energy. This principle helps explain: — Lift generated by an airplane wing
47. Which of the following is a scalar quantity? — Energy
48. Work is done when a force causes displacement. The SI unit of work is: — Joule
49. Archimedes' Principle deals with the buoyant force exerted on a body immersed in a fluid. It states that the buoyant force is equal to the: — Weight of the fluid displaced by the object
50. In thermodynamics, the First Law of Thermodynamics is a statement of the conservation of energy. It relates the change in internal energy of a system to the heat added to the system and the work done by the system. The formula is: — ΔU = Q - W
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