ASK Rare Notes – Study Notes & Exam Preparation

i. Which of the following is an example of Simple Harmonic Motion? (a) motion of a simple pendulum (b) the motion of ceiling fan (c) the spinning of the Earth on its axis (d) a bouncing ball on floor ... Answer is (a)  motion of a simple pendulum Simple Harmonic Motion (SHM) is defined as a periodic motion of a body along a straight line about fixed point (mean position), such that its acceleration of the body is directly proportional to the displacement of the body from the mean position and always directed towards the mean position ( a ∝ - x ) So, Here the Motion of a Simple Pendulum can only satisfies all the conditions as mentioned in the definition. Show Answer ii. If the mass of the bob of a pendulum is increases by a factor of 3, the period of the pendulum's motion will (a) be increased by a factor of 2 (b) remain the same (c) be decreased by a factor of 2 (d) be decreased by a factor of 4 ... Answer ...

i. Two equal but unlike parallel forces having different line of action produce (a) torque (b) couple (c) equilibrium (d) neutral equilibrium ... Answer is (b)  couple When Forces are equal and line of action are same then "NO Motion". When Forces are unequal and line of action same then there will Translational motion. When Forces are equal but the line of action are not the same they produce Couple. Show Answer ii. The number of forces that can be added by head to tail rule are: (a) 2 (b) 3 (c) 4 (d) any number ... Answer is (d)  any number According to head to tail rule we can add two or more vectors. So among four option "any number " is the correct answer. Show Answer iii. The number of perpendicular components of a force are: (a) 1 (b) 2 (c) 3 (d) 4 ... Answer is (b) 2 The process of splitting of vector into its components is called Resolution ...

i. Newton's first law of motion is valid only in the absence of (a) force (b) net force (c) friction (d) momentum ... Answer is (b)  net force According to Newton's first law of motion, a body continues its state of rest or of uniform motion in a straight line provided no net force act on it. For example a book lying on the table remains at rest as long as no net force act on it. Similarly, a moving object does not stop moving by itself if there is no force to oppose the motion of a body. Show Answer ii. Inertia depends upon (a) force motion (b) net force (c) mass (d) velocity ... Answer is (c)  mass Inertia of a body is its property due to which it opposes any change in its state of rest or motion. It depends solely upon mass. The more mass, the more inertia and vice versa. Show Answer iii. A boy Jumps out of a moving bus. There is a danger for him to fall: (a) towards the moving bu...

i. A body has translatory motion if it moves along a (a) straight line (b) circle (c) line without rotation (d) curved path ... Answer is (a)  straight line In Translatory or Translational motion, a body moves along a line without any rotation. The line may be straight or curved. For example, a car moving in a straight line has translational motion. Similarly, an aeroplane moving straight in translation motion. Show Answer ii. The motion of a body about its axis is called ? (a) circular motion (b) rotatory motion (c) vibratory motion (d) random Motion ... Answer is (b)  rotatory motion The spinning motion of a body about its axis is called rotatory motion. The motion of wheel, motion of a top, the motion earth about its geographic axis that causes day and night are the example of rotatory motion. Show Answer iii. Which of the following is a vector quantity? (a) speed (b) distance ...

i. The number of base units in SI are? (a) 3 (b) 6 (c) 7 (d) 9 ... Answer is (c)  7 A base unit is a unit adopted for measurement of a base quantity. The System of International (SI) consists of seven base units include: metre, kilogram, second, ampere, Kelvin, mole and candela (The units of the Base Quantity mass, length, time, electric current, temperature, amount of substance and luminous intensity respectively). Show Answer ii. Which one of the following unit is not a derived unit ? (a) pascal (b) kilogram (c) newton (d) watt ... Answer is (b)  kilogram Kilogram is a base unit for the measurement of the base quantity Mass, while the other pascal, newton and watt are derived units. Show Answer iii. Amount of a substance in terms of numbers is measured in ? (a) gram (b) kilogram (c) newton (d) mole ... Answer is (d) Mole In SI units amount of a substance is the ba...

SSC-I (9th Class) Physics:  Please  Select from Below Unit 1.  Physical Quantities and Measurement     📖   MCQS ( Exercise)     Click Here Unit 2.  Kinematics   📖   MCQS ( Exercise)    Click Here Unit 3.   Dynamics    📖    MCQS ( Exercise)    Click Here Unit 4.   Turning Effects of Forces    📖  MCQS ( Exercise)    Click Here Unit 5.   Gravitation    📖   MCQS ( Exercise)    Click Here Unit 6.  Work and Energy 📖    MCQS ( Exercise)    Click Here   Unit 7.   Properties of Matter     📖    MCQS ( Exercise)    Click Here Unit 8.   Thermal  Properties of Matter    📖    MCQS ( Exercise)    Click Here Unit 9.  Transfer of Heat 📖    MCQS ( Exercise)    Click He...