This quiz works best with JavaScript enabled. Home > Science > Physics > Physics – Quiz 44 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Physics Quiz 44 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What happen when the object in projectile motion reaches its maximum height? A) It begins to accelerate downward. B) It begins to accelerate parabolic. C) It begins to accelerate sideward. D) It begins to decelerate. Show Answer Correct Answer: A) It begins to accelerate downward. 2. A car has a mass of 1500 kg. A constant resultant force acts on the car and the car accelerates from 15 m / s to 20 m / s in 4.0 seconds. What is the magnitude of the resultant force acting on the car? A) 300 N. B) 1200 N. C) 1900 N. D) 7500 N. Show Answer Correct Answer: C) 1900 N. 3. Who wrote the Indian National Anthem? A) Bakim Chandra Chatterji. B) Rabindranath Tagore. C) Swami Vivekanand. D) None of the above. Show Answer Correct Answer: B) Rabindranath Tagore. 4. It is an equation that shows equivalent amount of different units A) Derived units. B) Metric system. C) Unit equality. D) Dimensional analysis. Show Answer Correct Answer: C) Unit equality. 5. Which of the following is the longest? A) 2 m. B) 78.74 in. C) 6.56 ft. D) None of them. Show Answer Correct Answer: D) None of them. 6. If lift is going up with acceleration, the apparent weight of a body is A) Equal to the true weight. B) Less than the true weight. C) More than the true weight. D) May be more or less than true weight. Show Answer Correct Answer: C) More than the true weight. 7. When the crest of one wave passes through the trough of another wave, ..... takes place. A) Resonance. B) Diffraction. C) Destructive interference. D) Constructive interference. Show Answer Correct Answer: C) Destructive interference. 8. The state or phase of matter that has a definite volume but no definite shape is A) Solid. B) Liquid. C) Gas. D) Vapor. Show Answer Correct Answer: B) Liquid. 9. What will happen to the period of the pendulum when it is brought to Jupiter from Earth? A) It will decrease. B) It will increase. C) It will be the same. D) It will become zero. Show Answer Correct Answer: A) It will decrease. 10. What is the relation between wavelength, frequency and velocity? A) Velocity of wave = wavelength/frequency. B) Velocity of wave = frequency/wavelength. C) Velocity of wave = frequency * wavelength. D) None of above. Show Answer Correct Answer: C) Velocity of wave = frequency * wavelength. 11. What is the maximum height of a projectile launched with initial velocity f 25 m/s at an angle of 30$^ \circ$? A) 7.98 m. B) 15.94 m. C) 31.89 m. D) 63. 76 m. Show Answer Correct Answer: A) 7.98 m. 12. Forces always act in equal and opposite pairs. A) Newton's 1st Law. B) Newton's 2nd Law. C) Newton's 3rd Law. D) Newton's 4th Law. Show Answer Correct Answer: C) Newton's 3rd Law. 13. Power is work done over time or energy over time? A) Work done over time. B) Both. C) Energy over time. D) Neither. Show Answer Correct Answer: B) Both. 14. A ball is thrown downward from the top of a roof with a speed of 25 m/s. After 2 s, its velocity will be:(Choose upward as positive) A) 19.6 m/s. B) -5.4 m/s. C) -44.6 m/s. D) 44.6 m/s. Show Answer Correct Answer: C) -44.6 m/s. 15. What are the net force and the direction of movement? A) 50 N, left. B) 50 N, right. C) 500 N, left. D) 450 N, right. Show Answer Correct Answer: A) 50 N, left. 16. Which correctly describes the relationship between the x-and y-velocities of projectiles? A) They depend on each other. B) They are independent of each other. C) The x-component is equal to the y-component. D) The y-component is always greater than the x-component. Show Answer Correct Answer: B) They are independent of each other. 17. Two charges separated by a distance of 1 meter exert a 20-N force on each other. If the charges are pulled to a 2 meter separation distance, the force on each charge will be A) 10 N. B) 5 N. C) 2.5 N. D) 40 N. Show Answer Correct Answer: B) 5 N. 18. The time it takes an object to go in a circle is called the ..... A) Period. B) Frequency. C) Time. D) Revolution. Show Answer Correct Answer: A) Period. 19. The SI units for force are ..... A) Kilograms. B) Newtons. C) Meters per second. D) Pounds. Show Answer Correct Answer: B) Newtons. 20. Which is the ratio of the water vapor actually present in the atmosphere to the amount that would be present if the air were saturated at the prevailing temperature and pressure A) Absolute humidity. B) Relative humidity. C) Dew point. D) None of above. Show Answer Correct Answer: B) Relative humidity. ← PreviousNext →Related QuizzesScience QuizzesPhysics Quiz 1Physics Quiz 2Physics Quiz 3Physics Quiz 4Physics Quiz 5Physics Quiz 6Physics Quiz 7Physics Quiz 8Physics Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books