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FE - Physics
Physics / GED0081
| Question | Answer |
|---|---|
| M1-2: | |
| Which of the following is true about vectors? | A vector can be represented by matrices. |
| The magnitude of a vector is the square root of the sum of the squares of the components. | True |
| Which of the following is a scalar quantity? | Temperature |
| Two vectors are equal if they are in the same direction only | False |
| Which of the following quantities is scalar? | work |
| What is the unit vector representation of the vector <4,5>? | <4/sqrt(41), 5/sqrt(41)> |
| Find the unit vector in the direction of <1,0,0>. | <1,0,0> |
| Which of the following trigonometric function is involved in dot product? | cosine |
| What is the cross product of two vectors with 1800 angle in between them? | 0 |
| What is the cross product of two vectors with -1800 angle in between them? | 0 |
| What is the cross product of two unit vectors where one is along the positive z-axis and the other is along the positive y-axis, respectively? | <-1, 0, 0> |
| The result of a cross product is always _______. | vector |
| Which of following vector most likely points at an angle of inclination of 73°? | A vector pointing towards the north-east direction. |
| What is the magnitude of a unit vector? | 1 |
| Which of the following is a scalar quantity? | Energy |
| Where 'a' is the length of the vector and 'B' is the angle it makes with the x-axis, what is the length of its component along the y-axis? | asinB |
| Energy is a vector quantity | False |
| Where 'x' is the length of the vector and 'Y' is the angle it makes with the x-axis, what is the length of its component along the y-axis? | xsinY |
| A unit vector along the x-axis is _________ to a unit vector along the z-axis. | perpendicular |
| Which of the following is true about the properties of dot product? | The dot product operation is commutative. |
| Which of the following trigonometric function is involved in cross product? | sine |
| _______________________________________________________________________ | _______________________________________________________________________ |
| _______________________________________________________________________ | _______________________________________________________________________ |
| M3-4: | |
| This term refers to the speed of an object throughout its whole journey. | Average speed |
| Which of the following best describes an object moving in free fall motion? | An egg thrown vertically upward neglecting air resistance |
| If an object is merely dropped (as opposed to being thrown) from an elevated height, then the initial velocity of the object is _________. | Zero |
| Displacement can be obtained from: | the area under a velocity-time graph |
| Which of the following is not true regarding the position vs. time graph shown above? | The object is at rest. |
| _______________________________________________________________________ | _______________________________________________________________________ |
| _______________________________________________________________________ | _______________________________________________________________________ |
| M5-6: | |
| If an object is moving at a constant speed in a straight line, what can you conclude about the net force acting on it? | The net force is zero |
| What is the term used to describe the tendency of an object to resist changes in its motion? | Inertia |
| When an object is in equilibrium, the net force acting on it is equal to what? | Zero |
| Which law of motion explains why a soccer ball keeps rolling after being kicked? | Newton's First Law |
| Which law of motion explains why it is harder to push a heavy object than a light one? | Newton's Second Law |
| A mass sliding down a frictionless inclined plane has how many forces in its FBD? | 2 |
| What is the relationship between force, mass, and acceleration according to Newton's second law of motion? | Force = mass x acceleration |
| According to Newton's first law of motion, an object at rest will remain at rest unless acted upon by what? | External force |
| What is the term for the force that opposes the relative motion of two surfaces in contact? | Friction |
| What is the term for the force of attraction between two objects with mass? | Gravity |
| According to Newton's laws of motion, what happens to an object in motion if no external forces act on it? | It continues to move at a constant velocity |
| A brick slides on a horizontal surface. Which of the following will increase the magnitude of the frictional force on it? | Putting a second brick on top |
| If a net force is applied to an object, what may happen to its motion? | Any of the choices |
| What is the SI unit for force? | Newton (N) |
| Which law of motion explains why a person is pushed backward when a car accelerates suddenly? | Newton's First Law |
| According to Newton's third law of motion, for every action, there is an equal and opposite what? | Reaction |
| Newton's second law of motion states that the acceleration of an object is directly proportional to what? | The net force acting on it |
| _______________________________________________________________________ | _______________________________________________________________________ |
| _______________________________________________________________________ | _______________________________________________________________________ |
| M7-9: | |
| _______________________________________________________________________ | _______________________________________________________________________ |
| What is the relationship between work and energy? | Energy is a measure of the ability to do work |
| Which of the following statements is true about the conservation of energy? | The total energy of a closed system remains constant. |
| According to the work-energy theorem, what happens to the kinetic energy of an object when work is done on it? | It increases |
| Which of the following terms refers to the ability to do work? | Energy |
| What is the SI unit of work? | Joule |
| What is the formula for calculating work? | Work = force × distance |
| Which of the following statements is true about power? | It is the rate at which work is done. |
| What is the formula for calculating gravitational potential energy? | PE = mgh |
| A force of 10 N is applied to an object and it moves a distance of 5 m in the direction of the force. How much work is done on the object? | 50 J |
| How does the height of an object affect its potential energy? | The higher the object, the higher its potential energy |
| Which of the following statements is true about potential energy? | It is the energy associated with an object's position or condition. |
| How does impulse relate to momentum? | Impulse is equal to the change in momentum of an object. |
| Which of the following is an example of an elastic collision? | A ball bouncing off a wall. |
| If the net external force acting on an object is zero, what can be said about its momentum? | The momentum is constant. |
| In a collision between two objects, which of the following statements is true? | Momentum is always conserved. |
| What does it mean for an object to have zero momentum? | The object is at rest. |
| Which of the following statements accurately describes the law of conservation of momentum? | The total momentum of a system is always constant. |
| What is the relationship between force and time in the context of impulse? | Force is inversely proportional to time. |
| Which of the following is an example of an inelastic collision? | Two cars colliding and sticking together. |
| How is momentum defined in physics? | Momentum is the product of an object's mass and velocity. |
| What is the unit of measurement for momentum? | kg-m/s |
| What happens to an object's momentum if its mass is doubled? | The momentum doubles. |
| Which of the following statements accurately describes impulse? | Impulse is the change in momentum experienced by an object. |
| Define the term "work" in the context of physics. | The energy transferred to or from an object |
| Which of the following is a scalar quantity? | Work |
| What is the SI unit of power? | Watt |
| What is the relationship between power and time? | Power is the rate at which work is done |
| What type of energy is stored in a compressed spring? | Elastic potential energy |
| Which of the following statements accurately describes momentum? | Momentum is a vector quantity. |
| How does the concept of impulse help explain the effect of airbags in car crashes? | Airbags increase the time of impact, reducing the force exerted on the occupants. |
| What is the difference between work and power? | Work is the rate at which energy is transferred, while power is the energy transferred over time. |
| How does the law of conservation of energy apply to a closed system? | Energy is conserved if there are no external forces acting on the system |
| What is the definition of mechanical energy? | The energy associated with the motion of an object |
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