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Class: XI, 11, First Year

Unit :02 Kinematics

MCQs Covered:
1. To get a resultant displacement of 10m, two displacement vectors of magnitude 6m and 8m should be combined:
(a) Parallel
(b) Antiparallel
(c) At an angle of 45°
(d) Perpendicular to each other


2. The velocity of a particle at an instant is 10 m/s and after 5sec the velocity of particle is 20m/s. The velocity 3 sec before in m/s is:
(a) 8
(b) 4
(c) 6
(d) 7

3. A ball is thrown upwards with a velocity of 100 m/s. It will reach the ground after:
(a) 10 sec
(b) 20 sec
(c) 5 sec
(d) 40 sec

4. Two projectiles are fired from the same point with the same speed at angles of projection 60° and 30° respectively. Which one of the following is true?
(a) The range will be same
(b) Their maximum height will be same
(c) Their landing velocity will be same
(d) their time of flight will be same

5. The ratio of numerical values of average velocity and average speed of a body is always:
(a) Unity
(b) Unity or less
(c) Unity or more
(d) Less than unity

6. If the average velocities of a body become equal to the instantaneous velocity, body is said to be moving with:
(a) Uniform acceleration
(b) Uniform velocity
(c) Variable velocity
(d) Variable acceleration


7. At the top of a trajectory of a projectile, the acceleration is:
(a) maximum
(b) minimum
(c) zero
(d) g

8. At what angle the range of projectile becomes equal to the height of projectile?
(a) 65°
(b) 45°
(c) 76°
(d) 30°

9. The angle at which dot product becomes equal to the cross product is:
(a) 65°
(b) 45°
(c) 76°
(d) 30°

10. If the dot product of two non-zero vectors vanishes; the vectors will be:
(a) in the same direction
(b) opposite direction to each other
(c) perpendicular to each other
(d) zero