CBSE
Multiple Choice QuestionsA particle starting from the origin (0,0) moves in a straight line in the (x,y) plane. Its coordinates at a later time are ( 
). The path of the particle makes with the x -axis an angle of:
30o
45o C
60o C
60o C
A car moves from X to Y with a uniform speed vu and returns to Y with a uniform speed vd. The average speed for this round trip is:
are two vectors and θ is the angle between them if 
the value of θ is:
60o
45o
30o
30o
A particle moving along x- axis has acceleration f, at time t, given f = fo (1-t/T), where fo and T are constants. The particle at t =0 and the instant when f = 0, the particle's velocity (vx) is:
foT
foT2/2
foT2
foT2
For angles of projection of a projectile at angles (45° - θ) and (45° + θ), the horizontal ranges described by the projectile are in the ratio of
1:1
2:3
1:2
1:2
A car runs at aconstant speed on a circular track of radius 100 m, taking 62.8 s for every circular lap. The average velocity and average speed for each circular lap respectively is
0, 0
10 m/s, 10m/s
10 m/s, 10m/s
The vectors 
are such that a:
The angle between the two vectors is
Preeti reached the metro station and found that the escalator was not working. She walked up the stationary escalator in time t1. On other days, if she remains stationary on the moving escalator, then the escalator takes her up in time t2. The time taken by her to walk up on the moving escalator will be
The moment of the force, 
at (2, 0, 3) about the point (2,-2,2), is given by
A body is projected vertically upwards. The times corresponding to height h while ascending and while descending are t1 and t2, respectively.
