1211. The Horizontal range of a projectile, at a certain place , depends upon:

A. The mass of the projectile
B. The velocity of projection
C. The angle of projection
D. The angle as well as velocity of projection *

1212. The velocity and acceleration of a body moving with uniform speed in circle are :

A. Parallel
B. Opposite
C. Mutually perpendicular *
D. None of the above

1213. The time it would take for an iron ball and a wooden ball of the same radius to reach ground from a height of “H” in vacuum would be:

A. Unequal
B. Exactly equal *
C. Roughly equal
D. Zero

1214. Which of the following statements for an object in equilibrium is not true ?

A. The object must be at rest *
B. The article can be very still
C. The object continues to move at the same speed.
D. The object has no acceleration.

1215. At the top of the trajectory of a projectile , the directions of its velocity and acceleration are :

A. Perpendicular to each other *
B. Parallel to each other
C. Inclined to each other at an angle of 45 degree
D. Antiparallel to each other

1216. When a body is moving on a surface , the force of friction is called :

A. Static friction
B. Dynamic friction *
C. Limiting friction
D. Rolling friction

1217. Combining two displacement vectors of magnitudes 6m and 8m will produce a resultant displacement of 10m:

A. Parallel
B. Anti parallel
C. At angle 60 degree
D. Perpendicular to each other *

1218. If the values of instantaneous and average velocities are equal , the body is said to be moving with :

A. Uniform acceleration
B. Uniform speed
C. Variable velocity
D. Uniform velocity *

1219. Particles travel at a speed of 10 m/s at any given instant and 20 m/s after 5 seconds. In m/s, the speed 3s before is:

A. 8
B. 4 *
C. 6
D. 2

1220. In case when there is no total displacement and average velocity , then the motion is described by:

A. Variable velocity
B. Instantaneous velocity *
C. Initial velocity
D. None of the above