0
question_answer1) When does a cyclist appear to be stationary with respect to another moving cyclist?
question_answer2) Can the earth be regarded as point object when it is describing its yearly journey around the sun?
question_answer3) Can the displacement be greater than the distance travelled by an object? Give reason.
question_answer4) Can the speed of a body be negative?
question_answer5) Can a body have a constant speed and still have a varying velocity?
question_answer6) Can a body have a constant velocity and still have a varying speed?
question_answer7) Can a particle in one-dimensional motion have zero speed and a non-zero velocity?
question_answer8) Can a body have zero velocity and still be accelerating?
question_answer9) Can an object have an eastward velocity while experiencing a westward acceleration?
question_answer10) Can the direction of velocity of an object change, when acceleration is constant?
question_answer11) Is it possible for a body to be accelerated without speeding up or slowing down? If so, give an example.
question_answer12) Under what condition is the average velocity equal to the instantaneous velocity?
question_answer13) Why is the speed, in general, greater than the magnitude of the velocity?
question_answer14) Is the direction of acceleration same as the direction of velocity?
question_answer15) Can we use the equations of kinematics to find the height attained by a body projected upwards; with any velocity?
question_answer16) Two balls of different masses (one lighter and other heavier) are thrown vertically upward with same initial speed. Which one will rise to the greater height?
question_answer17) Two balls of different masses (one lighter and other heavier) are thrown vertically upwards; with the same speed. Which one will pass through the point of projection in their downward direction with the greater speed?
question_answer18) Can the relative velocity of two bodies be greater than the absolute velocity of either body?
question_answer19) A car travelling with a velocity of \[\mathbf{50km }{{\mathbf{h}}^{\mathbf{-1}}}\] on a straight road is ahead of a motor-cycle travelling with a speed of\[\mathbf{75km }{{\mathbf{h}}^{\mathbf{-1}}}\]. How would the relative velocity be altered if motor cycle is ahead of car?
question_answer20) Even when rain is falling vertically downwards, the front screen of a moving car gets wet while the back screen remains dry. Why?
question_answer21) Is it possible that the brakes of a car are so perfect that the car stops instantaneously. If not, why?
question_answer22) When an observer is standing on earth, the trees and houses appear stationary to him. However, when he is sitting in a moving train, all these objects appear to move in backward direction. Why?
question_answer23) The displacement of a body is given to be proportional to the cube of time elapsed. What is the nature of the acceleration of the body?
question_answer24) The average velocity of a particle is equal to its instantaneous velocity. What is the nature of its displacement-time graph?
question_answer25) Can the position-time graph have a negative slope?
question_answer26) What is the nature of the displacement- time curve of a body moving with constant velocity?
question_answer27) Can the direction of motion of a body change if its velocity is changing at uniform rate?
question_answer28) Draw position-time graphs for two objects having zero relative velocity.
question_answer29) Is it possible to have a constant rate of change of velocity when velocity changes both in magnitude and direction? If yes, give one example.
question_answer30) Can a body be at rest as well as in motion at the same time? Explain. Or Rest and motion are relative terms. Explain.
question_answer31) If the displacement of a body is zero, is the distance covered by it necessarily zero? Comment with suitable illustration.
question_answer32) State in the following cases, whether the motion is one, two or three dimensional: (i)a kite flying on a windy day, (ii) a speeding car on a long straight high way, (iii) a carrom coin rebounding from the side of the board, (iv) an insect crawling on a globe, and (v) a planet revolving around its star ?
question_answer33) Which of the two-velocity or acceleration, gives the direction of motion of the body. Justify your answer by an example.
question_answer34) Two straight lines drawn on the same displacement-time graph make angles \[\mathbf{30}{}^\circ \]and \[\mathbf{60}{}^\circ \] with time-axis respectively, as shown in Fig. Which line represents greater velocity? What is the ratio of the two velocities?
question_answer35) If in case of a motion, displacement is directly proportional to the square of the time elapsed, what do you think about its acceleration i.e., constant or variable? Explain why.
question_answer36) Show that the average velocity of an object over an interval of time is either smaller than or equal to the average speed of the object over the same interval.
question_answer37) An object is in uniform motion along a straight line. What will be position-time graph for the motion of the object if (a) \[{{x}_{0}}=+\mathbf{ve},\upsilon =+ve\] (b) \[{{x}_{0}}=+\mathbf{ve},\upsilon =-ve\] (c) \[{{x}_{0}}=+\mathbf{ve},\upsilon =-\mathbf{ve}\] (d) Both \[{{x}_{0}}\] and \[\upsilon \]are negative? The letters \[{{x}_{0}}\] and \[\upsilon \] represent position of the object at \[t=0\]and uniform velocity of the object respectively.
question_answer38) An object has uniformly accelerated motion. The object always slows down before the time, when its velocity becomes zero. Prove this statement graphically, when (a) both u and a are positive (b) \[u=-ve\] and \[a=+ve\](c) \[u=+ve\]and \[a=-ve\] and (d) both u and a are negative.
question_answer39) The distance covered by an object between times \[{{t}_{1}}\] and \[{{t}_{2}}\] given by the area under the \[\upsilon -t\]graph between \[{{t}_{1}}\] and \[{{t}_{2}}\] Prove this statement for an object moving with negative acceleration and having a positive velocity at time \[{{t}_{1}}\] and a negative velocity at time \[{{t}_{2}}\]
question_answer40) Distinguish between distance and displacement.
question_answer41) Distinguish between speed and velocity.
Please Wait you are being redirected....
You need to login to perform this action.You will be redirected in 3 sec
OTP has been sent to your mobile number and is valid for one hour
Your mobile number is verified.