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Chapter 4: Rotational and Circular Motion

60 Questions 60 Minutes Pass: 60%
1 When an object moves along a circle with constant speed its motion is called
2 The angle through which a body moves, while moving along a circular path is called
3 The angular displacement is represented by
4 The S.I. unit of angular displacement is
5 The circumference of the circle is equal to
6 The relation between the length of an arc, radius of the circle angle in radian is
7 The angle subtended at the center of a circle by an arc equal in length to its radius is called
8 2 π radian =
9 1 rad =
10 1° = ______ rad
11 The rate of change of angular displacement is called
12 The angular velocity is represented by
13 The S.I. unit of angular velocity is
14 The dimension of angular velocity are
15 The angular velocity ω is always directed along the
16 If a body is rotating in a circle with a certain constant tangential speed it must have:
17 If a body is moving in a circle of radius "r" with constant speed "V", the centripetal acceleration is:
18 Centripetal force is also called:
19 The force required to keep a body in circular motion is called:
20 What is the centripetal force acting on a mass of 20kg tied to a string 10m long and rotated at 1m/s?
21 The motion of a body along a straight line is called__.
22 The motion of a body along a curved path is called__.
23 The force, which keeps the body in circular motion and always directed towards the centre of the circle is called ______.
24 The acceleration of the body or particle tangent to the circular path is called ______.
25 In circular motion the tangential component of acceleration arises when ______.
26 In circular motion the centripetal component of acceleration arises when ______.
27 Centripetal acceleration and tangential acceleration are always ______.
28 A car rounds a 100m curve at 20m/s. What is its acceleration?
29 If the speed of an object moving in a circle is doubled, centripetal force ______.
30 When an object moves round a circular track, the centripetal force is provided by ______.
31 If an object is moving with constant speed along a circle then its motion is ______.
32 The time period of an object moving with speed v along a circle of radius r is ______.
33 The angle subtended by an object moving on a circle circumference is called ______.
34 One revolution is equal to ______.
35 1 radian is equal to ______.
36 The direction of angular velocity is determined by ______.
37 For counter-clockwise rotation, angular velocity direction is ______.
38 The relation between linear velocity (v) and angular velocity (ω) is ______.
39 If a particle covers equal angular displacements in equal times, its angular velocity is ______.
40 The rate of change of angular velocity is called ______.
41 The SI unit of angular acceleration is ______.
42 The SI unit of angular displacement is ______.
43 The central angle where arc length = radius defines ______.
44 The relation between linear (s) and angular (θ) displacement is ______.
45 In s = rθ, θ must be in ______.
46 1 radian equals ______ degrees.
47 1 degree equals ______ radians.
48 Angular displacement per unit time is called ______.
49 The relation between linear (a) and angular (α) acceleration is ______.
50 The velocity tangent to a circular path is called ______.
51 Time period (T) and angular velocity (ω) are ______.
52 For constant-speed circular motion, the acceleration is ______.
53 Centripetal acceleration direction is always ______.
54 The force producing centripetal acceleration is called ______.
55 The expression for centripetal acceleration is ______.
56 Two objects move in circles with same speed but rA > rB. Their angular velocities satisfy ______.
57 A car moves in a 100m circle at 10m/s. Its angular velocity is ______.
58 A boy runs on a 10m circular track with angular acceleration 1 rad/s². His linear acceleration is ______.
59 The force, which keeps the body in circular motion and always directed towards the centre of the circle is called ______.
60 The acceleration of the body or particle tangent to the circular path is called ______.