Reviewer-in-General-Physics-1-2nd-Quarter
.docx
School
Rizal Technological University**We aren't endorsed by this school
Course
BIOLOGY 1
Subject
Physics
Date
Jan 13, 2025
Pages
6
Uploaded by ChefSheepMaster901
Reviewer in General Physics 11. An elevator with a weight of 1,960N. Calculate the tension in the cable of the elevator moving upwards with an acceleration of 5 m/s2.A. T=392N B. T=1,920N C. T=2,960N D. T= 9,408N2. A girl pushes a cart with an angle of 15 degrees to the right with a distance of 5m. The applied force exerted is 44N. How much work is done?A. 211.5 JB. 212.5JC. 213.5 JD. 214.5 J 3. Which has more momentum, a heavy truck moving at 30 km/h, or a light truck moving at 30 km/h?A. heavy truckC. Both have the same momentumB.light truckD. Cannot be determined4. A bullet is shot horizontally from a shoulder height of 1.5 m and an initial speed of 200 m/s. How far does the bullet travel initially? A. 51 m B.111 m C. 151m D. 221m5. Suppose two cars A and B are moving with uniform velocities with respect to the ground along parallel tracks and in the same direction. The velocities of A and B be 60 km/h west and 80 km/h west respectively. What is the relative velocity of car B with respect to A?A.10 km/h northC. 15 km/h eastB.20 km/h westD. 25 km/h south6. John and Lourenz climb on a tree. John, a 30kg-boy, reached 15m while Lourenz, a 35kg-boy, 10m up a tree. Which of the following is the CORRECT statement about the gravitational potential energy of John and Lourenz?A. John has a greater gravitational potential energy than Lourenz.B. Lourenz has a greater gravitational potential energy than John.C. John and Lourenz have equal gravitational potential energy.D. John has a positive gravitational potential energy while Lourenz has a negative gravitational potential energy.7. A 0.5-kg ball attached to a spring is stretched with x=10 cm while a 1-kg ball when released to a frictionless surface is stretched with x=20 cm. The spring constant is k=7.0 N/m. How will you describe the elastic potential energy of the balls?A. 0.5-kg ball has a greater elastic potential energyB. 1-kg ball has a greater elastic potential energyC. Both balls have an elastic potential energyD. Cannot be determined8. Which of the following statement is TRUE about the properties of conservative forces?I.In any closed path, the work done by the conservative force is not equal to zero.II.The work done by a conservative force is reversible.III.When only conservative forces act on the system, the mechanical energy is constant.IV.Gravitational force is not an example of a conservative force.A. I & IIB. I & IVC. III & IVD. II & III9. Coinciding with the center of mass or the center of gravity is the point of defining the geometric center of an object. What is that point?A. Center of GravityC. Center of MassB. CentroidD. Geometric Center
10. In a constant temperature closed system process, 120 kJ of heat is transferred to the working fluid at 38 deg C. What is the change in entropy of the working fluid in kJ/K? A. 0.386 kJ/KB. 0.458 kJ/KC. 0.587 kJ/KD. 0.679 kJ/K11. Particle A of mass 2.0kg is moving at 15m/s to the east. Particle B of mass 3.0kg is moving to the west at 10.0m/s. What is the velocity of the center of the mass of the two particles?A. 0.55 m/s, westC. 1.8 m/s, eastB. zeroD. 1.8 m/s, west12. A 4.0-kg object has a forward momentum of 20. kgβ’m/s. A 60. Nβ’s impulse acts upon it in the direction of motion for 5.0 seconds. A resistive force of 6.0 N then impedes its motion for 8.0 seconds. What is the final velocity of the object?A. 8.0 m/sB. 1.4 m/sC. 2.6 m/sD. 2.6 m/s13. Using the diagram system below, which of the following is the CORRECT statement about the stability of the object?A. At stable equilibrium when π₯πππ₯.B. At neutral equilibrium when βπ₯πππ₯.C. At unstable equilibrium when x=0,βπ₯πππ₯and π₯πππ₯.D. At a turning point when π₯πππ₯and-π₯πππ₯. 14. A 5.0 kg ball moving at 6.0 m/s strikes a 3.0kg ball initially at rest. The 5.0 kg ball continuously moves in the same direction at 2.0 m/s after the collision What is the velocity of the 3.0 kg ball?A. 6.67 m/sB. 7.0 m/sC. 0.667 m/sD. 5.6 m/s15. A rope is placed over a massless and frictionless pulley. A mass of 8-kg is suspended at one end while a mass of 5-kg is suspended from the other end. Using 2nd law of motion, what is the acceleration of the system?A. 2.0m/s2B. 4. 0 m/π 2 C. 8.0 m/π 2D. 10.0 m/π 216. Which of the following statement is TRUE about static friction and kinetic friction?A. Kinetic friction is the force that keeps an object moving against a surface while static friction is the moment an object starts to move against a surface.B. Static friction is the force that keeps an object moving against a surface while kinetic friction is the moment an object starts to move against a surface.C. Static friction is present when one object slides over another while kinetic friction is when the object needs to overcome to start an object from moving.D. Kinetic friction prevents the motions of stationary objects acted upon by a force while static friction prevents the motions of moving objects acted upon by a force.17. At point A, a 2-kg ball was placed at a height of 0.5 m, then at point B the same ball dropped to the ground, and lastly, at point C placed it again at a height of 0.5 m. The total work done by the gravitational force is equal to 98 J. Therefore, what is the work done by gravitational force?A. Work done by gravitational depends on the path taken by the object.B. Work done by a gravitational force depends on the initial position and final position of the object.
C. Work done by the gravitational force depends on the mass of the object only.D. Work done by the gravitational force depends on the position of the object only.18. Based on the table below, it shows that the Optics book has the highest gravitational potential energy while the Mechanics book has the lowest gravitational potential energy. What can you conclude about gravitational potential energy?A. Gravitational potential energy (GPE) depends on the height of an object only.B. Gravitational potential energy (GPE) depends on the mass of an object only.C. Gravitational potential energy (GPE) depends BOTH on the height and mass of the object.D. Gravitational potential energy (GPE) depends on the height, mass, and acceleration due to the gravity of the object.19. A tropical depression entered the Philippine Area of Responsibility (PAR) with a 45 km/h northwest win. After 3 hours, it moved 15 km/hr in the same direction until it went out of the country. Which of the following is the graph showing the tropical depressionβs movement?A.C.B.D.20. Isaac Newton's third law of motion states that for every action there is an opposed and equal opposite reaction. Why is it called the Law of Interaction? A. When one object exerts a force on another object, that second object exerts an equal magnitude and opposite-direction force back. B. When one object exerts a force on another object, that second object exerts an equal magnitude in the same direction to move force forward. C. When one object exerts a force on another object, that second object exerts an equal magnitude and parallel force twice the force exerted. D. When one object exerts a force on another object, that second object exerts an equal magnitude and perpendicular amount of the first force exerted.21. 60. A Carnot engine operates between two temperatures reservoirs at 600 K and 300 K. If the engine absorbs 2,000 J of heat from the hot reservoir, what is the amount of heat rejected to the cold reservoir? A. 1500 JB. 1200 JC. 1000 JD. 700 J
22. The speed of sound in air is affected by which of the following? A. Temperature B. Humidity C. Air pressure D. All of the above23. Which of the following statements describes the relationship between elastic potential energy and kinetic energy in a simple harmonic motion? A. There is no relationship.B. Elastic potential energy is always greater than kinetic energy.C. Elastic potential energy and kinetic energy are equal at all points.D. Elastic potential energy and kinetic energy interchange as the object moves.24. Which of the following correctly describes the Dopplerβs effect?A. Change in frequency due to the motion of the source or observer.B. Change in amplitude due to distance from the source.C. Reflection of waves off a surface.D. Refraction of waves as they enter a new medium.\25. In the context of sound intensity, which of the following correctly describes the inverse square law?A. Intensity is proportional to the square of the distance.B. Intensity decreases as the square of the distance from the source increases.C. Intensity is constant regardless of the distance.D. Intensity increases with distance from the source.26. A steel beam is 10 meters long at 25 deg C. If the temperature rises to 75 deg C and the coefficient of the linear expansion for steel is 11.7 10^(-6) β^(-1), calculate the percent increase in length of the steel beam?A. 0.105%B. 0.117%C. 0.212%D. 0.231%27. Suppose that there are two liquids of two densities; Οa=1500 kg/m3and Οb=500 kg/m3were poured together inside a 100 L tank, filling it. If the resulting density of the mixture is Οmix=800 kg/m3, find the respective volume quantities of liquids used. A. Va= 60 L ,Vb= 40 LB. Va= 45 L , Vb= 55 LC. Va= 50 L , Vb= 50 LD. Va= 30 L , Vb= 70 L28. In a venturi meter, what happens to fluid velocity as the cross-sectional area decreases?A. It decreases.B. It remains the same.C. It increases.D. It fluctuates.29. Why is the Carnot Cycle considered the most efficient thermodynamic cycle?A. The Carnot Cycle can both receive and reject energy at the upper and lower temperatures.B. The Carnot Cycle has the ability to operate at higher compression ratios.C. The Carnot Cycle can both receive and reject energy at the upper temperature rangeD. The Carnot Cycle is excellent by converting high heat of vaporization of the working fluid into mechanical energy
30. An air bubble rises from the bottom of a well where the temperature is 25 β, to the surface where the temperature is 27 β. Find the percent increase in the volume of the bubble if the depth of the well is 5m. Atmospheric pressure is 101,528 Pascals. A. 56.7 %B. 49.3%C. 41.3%D. 38.6%31.In an ideal gas undergoing an isothermal process, which of the following statements accurately describes a system when heat is added?A. Equal to the work done by the system.B. Greater than the work done by the system.C. Less than the work done by the systemD. Equal to zero.32.What is the effect of increasing the temperature of an ideal gas in an isochoric process? A. The volume doubles. B. The volume decreases. C. The pressure increases.D. The pressure decreases.33. Which law of thermodynamics explains why no process can be 100% efficient? A. First lawB. Second lawC. Third lawD. Zeroth law34. In a given condition, the heat that the system absorbs during reversible isothermal expansion is equivalent to the work that the gas does since the internal energy remains constant at a constant temperature. Which of the following expressions accurately shows the entropy change in a reversible isothermal expansion of an ideal gas?A. βS=Q/TB. βS=W/TC. βS=0D. βS=PβV35.Which of the following is true about Carnot cycle? A. It involves two constant volume and two adiabatic processes. B. It involves two constant pressure and two constant volume processes. C. It involves two isothermal and isobaric processes. D. It involves two isothermal and adiabatic processes.36. Which of the following describes the heat exchange in an adiabatic process?A. Heat is absorbed by the system.B. Heat is released by the system. C. No heat is exchanged with the surroundings. D. Heat is transferred depending on the work done. 37. It is defined as the ratio of the force of gravity on a unit volume. A. Specific weight B. Specific volumeC. Mass density D. Specific entropy
38. Which of the following correctly describes entropy?A. Entropy is the energy flow in a system. B. Entropy is a measure of disorder or randomness of a system. C. Entropy is the ability of the system to do work. D. Entropy is the average kinetic energy of particles in a closed or open system.39. In an adiabatic expansion, the volume of the gas increases. What happens to its temperature? A. It increases. B. It decreases. C. It stays constant. D. It fluctuates.40. Which of the following statements clearly states the Third Law of Thermodynamics? A. The entropy of an isolated system always increases. B. The total energy of an isolated system is constant. C. As temperature approaches absolute zero, the entropy of the system approaches a minimum constant. D. Heat cannot spontaneously flow from a colder to a hotter body.