27/03/2020 Quantities, Mass and Weight(Senior Class Physics Study by Topics) 27/03/2020 0Comments by Gate Academy Welcome to your Quantities, Mass and Weight(Senior Class Physics Study by Topics) NAME EMAIL PHONE NUMBER 1. Which of the following instruments has a reading accuracy of 0.5mm? Protractor Meter rule Vernier callipers Spring balance Micrometer screw gauge 2. An object moves 4m eastwards and then 3m southwards. Its displacement from its original position is 7m SE 12m SE 1m SE 5m SE 3. Which of the following is the dimensions of pressure? I. ML-1T-2 II. ML-3 III. MLT-2 IV. ML2T-3 IV I II III 4. A bird flying due north with a velocity of 15m/s sheds a feather in an air current blowing at 20m/s due east. The feather will move with a velocity of 25m/s east of north 25m/s east of south 25m/s west of south 15m/s north 20m/s east 5. Which of the following nonstandard ''units'' could we theoretically use to express the frequency of a sound wave? the joule per minute the kilogram-meter per minute the hertz per minute the British thermal unit per meter the cycle per minute 6. Which of the following quantities has the same unit as the Watt? Force x distance Force x acceleration Force x time Force x velocity 7. The physical quantity that has the same dimensions as impulse is? Pressure Momentum Energy Surface tension 8. A stream is flowing at 0.75m/s and a boat heading perpendicularly to the stream landed at the opposite bank at an angle 30°. Calculate the velocity of the boat? 1.50m/s 1.00m/s 0.86m/s 0.65m/s 9. In order to remove the error of parallax when taking measurements with a meter rule, the eye should be focused Vertically upwards on the markings Vertically downwards on the markings Slantingly towards the right on the markings Slantingly towards the left on the markings 10. The pair of physical quantity that are scalar only are Impulse and time Volume and area Length and displacement Moment and momentum 11. Which of the following set of physical quantities are vectors? Force ratio & Velocity ratio Energy & Power Electric field potential & Electric field intensity Friction & Momentum Capacitance & Inductance 12. Which of the following statements are true about the spring balance and the chemical balance?I. Both are used to measure the mass of an objectII. Either of them may be used to measure the weight of an objectIII. The spring balance works on the principle of Hooke's law while the chemical balance works on the principle of momentsIV. A change in gravity changes the reading of a spring balance but not that of a chemical balance. I, II and III III and IV II and III I and IV I and III 13. Which of the following is a set of vectors? acceleration, moment and velocity force, mass and moment mass, volume and density mass, weight and density 14. Which of the following pairs of units do not agree in dimension? Moles & coulombs Meters & feet Meters & light years Candela & microwatts 15. A tugboat is traveling from New Jersey to Arkansas across a river with a resultant velocity of 20knots. If the river flows at 12knots, the direction of motion of the boat relative to the direction of water flow is 90° 136.87° 36.87° 53.13° 16. If the tape of a ticker-timer shows dots equally spaced at 1cm apart and the vibrator makes 50 dots per second, what is the speed of the tape in meter per second? 0.02m/s 0.1m/s 5.0m/s 50m/s 0.5m/s 17. The length of a ten tick is 8cm and it is covered in 1/5 seconds. Find the velocity of the body. 40cm/s 0.02cm/s 16cm/s 1.6cm/s 18. What is the reading of the vernier scale? 1.97cm 1.80cm 1.28cm 1.88cm 19. At what respective values of x, y and z would the unit of force, the Newton, be dimensionally equivalent to MxLyTz -1, 1, 2 -1, 1, -2 1, 1, -2 1, -1, 2 20. Dhanya travels 12km eastwards to a point B and then 5km southwards to another point C. Calculate the difference between the magnitude of the displacement of Dhanya and the distance traveled by him. 4km 30km 7km 13km 17km 21. For which of the underlisted quantities is the derived unit ML2T-2 correct?I. Moment of a forceII. WorkIII. Acceleration I Only I & II II & III II Only 22. The velocity v of a particle in time t is given by the equationv = 10 + 2t². Find the instantaneous acceleration after 5 seconds. 15m/s² 20m/s² 10m/s² 60m/s² 23. A boat travels due east at a speed of 40m/s across a river flowing due south at 30m/s. What is the resultant speed of the boat? 10m/s 70m/s 50m/s 1.3m/s 24. We can express electrical current in terms of charge carriers per cubic meter per kilogram per square meter per second 25. What would happen if the earth suddenly stopped moving in its orbit around the sun, but nothing else changed? Nobody knows The earth would remain fixed at the spot The earth would fall into the sun The earth would fly out of solar orbit 1 out of 25 Time is Up! Time's up