HomeCBSE CLASS 11Motion in a plane -MCQ test 1 Motion in a plane -MCQ test 1 Motion in plane Class 11 CBSE - MCQ test 1 Q1. A car is moving 6 KM in East then 3 KM North and 10 KM west.What will be the magnitude of resultant displacement from origin. 5KM 3KM 1KM 7KM Q2. A set of vectors are taken in given order of a closed polygon.Then the resultant of these vectors is ....... Scaler quantity Unit vector Null vector None of these Q3.Vector sum of two forces of 10N and 6N cannot be .............. 9N 16Nn 5N 11N Q4. Vector sum of two forces of 10N and 6N can be .............. 2N 18N 20N 8N Q5. Magnitude of Reusltant of two vectors a and b at angle θ is c .If position of vectors interchanged then its magnitude would be ............. Less than c. Equal of c. More than c. None of these Q6. Direction of reusltant of two vectors a and b at angle θ will .........If position of vectors interchanged. remains same change Can not say None of these Q7. If |P+Q|=|P-Q|, then the angle between P and Q is θ. What is the value of θ? 60° 90° P=0 Q=0. Q8.A particle moving, eastwards with a velocity of 5m/s. In 10s, its velocity changes to 5m/s northwards. The average acceleration in this time is 0 m/s² toward South West 1/√3 m/s² toward North West 1/√2 m/s² toward North West None of these Q9. The resulatnt of AX0 will be equal to................ 0 Zero vector A None of these Q10. The unit vector associated with vector A is ...... A/A |A|/A A/|A| None of these Q11. A vector that gives the position of a point with reference to point other than origin is called......... Coplanar Vector Displacement Vector Unit Vector Equal vector Q12. Which of following is true about null vector? It have zero magnitude It has no specific direction Both a and b None of these Q13.Displacement vector doenot depent on ............ Direction of motion Actual path length Both a and b None of these Q14. Which of following conditions are essential for a quantity to be a vector? Magnitude and direction. Magnitude and addition, subtraction, multiplication by ordinary rules of algebra. Magnitude, direction, and addition, subtraction multiplication and division by vector laws. Magnitude, direction, and combination of vectors by ordinary rules of algebra. Q15. How many minimum numbers of vectors in diffrent plane can be added to zero resultant? 2 3 4 None of these Q16. A particle has a displacement of 2 units along the x-axis, 1 unit along the y- axis and 2 units along the z - axis. Then Find the resultant displacement of the particle. 3 unit 4 unit 5 unit None of these Q17. If i,j,k are unit vectors along x,y,z axis respectively then they are ............ Parallel to each other Perpendicular to each other Both a and b None of these Q18. The path of a particle is given by the expression y = at + bt², where a and b are constants. y is the displacement at time t. Its velocity at any instant is given by 0 at 2bt a+2bt Q19.For motion in two or three dimensions, the angle between velocity and acceleration vectors may have any value........ 0° 90° 120° Between 0° and 180° Q20. The angle between the direction of î and/(î+j) is 0° 45° 60° 90° Q21. A particle has initial velocity 3i+4j and accelertion 0.4i+0.3j .What will be speed after 10sec? 10 unit 72 unit 7 unit 7√2 unit Q22. A particle moves in the xy plane with a constant acceleration of 1.5 m/s² in the direction making an angle of 37° with the x axis at t=0 the particle is at the origin and its velocity is 8 m/s along the x axis 49.6m,8.2m 48.6m,9.2m 46.6m,2.2m 41.6m,7.2m Q23. if |A+B|=|A| then ............ B=0 A and B are perpendicular. A-B<0 A and B are anti perallel. Q24. The coordinates of a particle moving in XY plane at any instant of time t are x=4t² and y=3t². The speed of the particle at that instant t is 2t 0 5t 10t Q25.If the angle between two forces increases, the magnitude of their resultant remains same frist increases then decreases increases decreases Submit Your Answers Newer Older
