Q1: What is the SI unit of velocity?
Ans: Meter per second (m/s).
Q2: Which law of motion states that an object will remain at rest or in uniform motion unless acted upon by an external force?
Ans: Newton's First Law of Motion.
Q3: What type of motion occurs when a body moves in a circle?
Ans: Circular motion.
Q4: What does the slope of a distance-time graph represent?
Ans: Speed.
Q5: What is the force that opposes the relative motion of two surfaces in contact?
Ans: Friction.
Q6: What is the term for the rate of change of velocity?
Ans: Acceleration.
Q7: What is the formula for calculating the first equation of motion?
Ans: v = u + at.
Q8: Which physical quantity has both magnitude and direction?
Ans: Vector quantity.
Q9: What is the term for the total distance covered by an object, irrespective of direction?
Ans: Distance.
Q10: What is the SI unit of force?
Ans: Newton (N).
Q11: What does the area under a velocity-time graph represent?
Ans: Displacement.
Q12: In which type of motion does an object repeat its movement at regular time intervals?
Ans: Periodic motion.
Q13: What is the term for the force that keeps an object moving in a circular path?
Ans: Centripetal force.
Q14: What does Newton’s Second Law of Motion state?
Ans: Force is the rate of change of momentum.
Q15: What type of motion occurs when a body moves back and forth about a fixed point?
Ans: Oscillatory motion.
Q16: What is the formula for calculating acceleration?
Ans: a = (v - u) / t.
Q17: What is the unit of acceleration in the SI system?
Ans: Meter per second squared (m/s²).
Q18: What is the equation for the third equation of motion?
Ans: v² = u² + 2as.
Q19: Which type of force acts between objects without direct physical contact?
Ans: Non-contact force.
Q20: What is the term for the speed of an object in a specific direction?
Ans: Velocity.
Q1: The __________ is the force exerted per unit area of a surface.
Ans: Pressure.
Q2: When an object is in __________ motion, it repeats its motion at regular intervals of time.
Ans: Periodic.
Q3: The __________ law states that pressure changes in a liquid are transmitted equally in all directions.
Ans: Pascal’s.
Q4: __________ motion involves an object moving back and forth about a fixed point.
Ans: Oscillatory.
Q5: The __________ force acts between objects that are not in physical contact with each other.
Ans: Non-contact.
Q1: Identify the correct statement(s):
(a) A scalar quantity has only magnitude.
(b) A vector quantity has only magnitude.
(c) Velocity is a scalar quantity.
(d) Displacement is always positive.
Ans: A.
Sol: A is correct because scalar quantities only have magnitude. B, C, and D are incorrect as vector quantities have both magnitude and direction, velocity is a vector quantity, and displacement can be positive, negative, or zero.
Q2: Identify the correct statement(s):
(a) An object in uniform motion covers equal distances in unequal intervals of time.
(b) The first equation of motion relates final velocity, initial velocity, acceleration, and time.
(c) The acceleration due to gravity is constant on Earth.
(d) Displacement can be greater than distance.
Ans: B, C.
Sol: B is correct as the first equation of motion is v = u + at. C is correct as the acceleration due to gravity is approximately 9.8 m/s². A is incorrect because in uniform motion, distances covered are equal in equal intervals of time. D is incorrect as distance is always equal to or greater than displacement.
Q3: Identify the correct statement(s):
(a) The unit of force is the Newton.
(b) Impulse is the product of force and displacement.
(c) Balanced forces lead to no change in motion.
(d) Friction is a contact force.
Ans: A, C, D.
Sol: A is correct because the unit of force is the Newton. C is correct as balanced forces lead to no change in motion. D is correct as friction is a contact force. B is incorrect as impulse is the product of force and time, not displacement.
Q4: Identify the correct statement(s):
(a) A body in non-uniform motion covers unequal distances in equal intervals of time.
(b) A velocity-time graph with a straight line indicates uniform motion.
(c) The area under a speed-time graph gives the displacement of an object.
(d) The force of gravity is stronger at higher altitudes.
Ans: A, B.
Sol: A is correct as non-uniform motion involves unequal distances in equal intervals of time. B is correct as a straight line in a velocity-time graph indicates uniform motion. C is incorrect as the area under a speed-time graph gives the distance, not the displacement. D is incorrect as gravity is weaker at higher altitudes.
Q5: Identify the correct statement(s):
(a) Force can change the state of motion of a body.
(b) Gravitational force is a contact force.
(c) Velocity is always greater than speed.
(d) Static friction is greater than kinetic friction.
Ans: A, D.
Sol: A is correct as force can change the state of motion of a body. D is correct as static friction is greater than kinetic friction. B is incorrect as gravitational force is a non-contact force. C is incorrect as speed is always greater than or equal to velocity.
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