Page 1 - HOME ASSIGNMENTS(Motion in a Plane)

HOME ASSIGNMENTS ( Motion in a Plane)

1 The magnitude of resultant vector is equal to sum of the magnitudes of
the two vectors and its direction is same as that of two given vectors.

2 A particle is given a displacement of 4m in the x - y plane. If the x
component of displacement vector is 2m, then y component is

a)2m b)2√2m c)2√3m d)4m

3 . The magnitude of resultant vector is equal to sum of the magnitudes of
the two vectors and its direction is same as that of two given vectors.

a) The two vectors act at some angle.

b) The two vectors act in opposite direction.

c) The two vectors are acting in the same direction.

4 . A particle moves with a constant speed v along a circular path of radius r
and completes the circle in time T. The acceleration of the particle is
____.
2
2
a) 2πr/T b) 2πv/T c) 2π r /T d) 2π v / T

5 A body is projected horizontally from a point above the ground. The
2
motion of the body is given by the equations x = 2t and y = 5t where x
and y are horizontal and vertical displacements in m at time t. The
trajectory of the body is ____. 5 km/ hr

a) a straight line b) a circle c) an ellipse d) a parabola

6 Four bombs of 5 kg, 15 kg, 25 kg and 45 kg are fired from cannon with the
same velocity in the same direction. Which of the following options is
right ____? Note: Ignore air resistance

a) All bombs will reach the ground at the same time.

b) The time taken will be in direct proportion to their masses.
c) The time taken will be inversely proportional to their masses.d)
The range will be same.