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21-Which of the following can be zero, when a particle is in motion for some time? (a) displacement (b) none of these (c) distance (d) speed 22-The dimensional formula for speed is (a) T-¹ (b) LT-¹ (c) L-¹T-¹ (d) L'T 23-A simple pendulum is kept oscillating in a lift. If the lift starts moving down with uniform velocity then the periodic time of the simple pendulum_ (a) will increase (b) will not change (c)will decrease (d) will be zero

21-Which of the following can be zero, when a particle is in motion for some time? (a) displacement (b) none of these (c) distance (d) speed 22-The dimensional formula for speed is (a) T-¹ (b) LT-¹ (c) L-¹T-¹ (d) L'T 23-A simple pendulum is kept oscillating in a lift. If the lift starts moving down with uniform velocity then the periodic time of the simple pendulum_ (a) will increase (b) will not change (c)will decrease (d) will be zero

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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21-Which of the following can be zero, when a particle is in motion for some time? (a) displacement (b) none of these (c) distance (d) speed 22-The dimensional formula for speed is (a) T-¹ (b) LT-¹ (c) L-'T-¹ (d) L''T 23-A simple pendulum is kept oscillating in a lift. If the lift starts moving down with uniform velocity then the periodic time of the simple pendulum_ (a) will increase (b) will not change (c)will decrease (d) will be zero 24- In SHM of a simple pendulum, the component of weight which is directed towards mean position is (a) mg cose (c) mg tane (b) mg sine (d) none of above 25-The units used to measure derived quantities are known as (a) square units. (b) derived units (c) base units (d) scalar units 26- In a simple pendulum, the force acting along the string is (a) 0 (b) mg sine (c) mg cost (d) 1 27-If potential energies and kinetic energies are equal then displacement of an object in SHM is (a) 4 (b) 0 (c) 2 (d)6 28-If the time period of a simple pendulum is 2 s then it's length is (a) 1.02m (b) 1.2m (c) 1.4m (d) 1.5m 29-The restoring force pushes or pulls the oscillatory object (a) towards mean position (b) away from mean position (c) at central point (d) extreme point 30- An object at rest may have (a) momentum (b) potential energy (c) velocity (d) kinetic energy
Transcribed Image Text:21-Which of the following can be zero, when a particle is in motion for some time? (a) displacement (b) none of these (c) distance (d) speed 22-The dimensional formula for speed is (a) T-¹ (b) LT-¹ (c) L-'T-¹ (d) L''T 23-A simple pendulum is kept oscillating in a lift. If the lift starts moving down with uniform velocity then the periodic time of the simple pendulum_ (a) will increase (b) will not change (c)will decrease (d) will be zero 24- In SHM of a simple pendulum, the component of weight which is directed towards mean position is (a) mg cose (c) mg tane (b) mg sine (d) none of above 25-The units used to measure derived quantities are known as (a) square units. (b) derived units (c) base units (d) scalar units 26- In a simple pendulum, the force acting along the string is (a) 0 (b) mg sine (c) mg cost (d) 1 27-If potential energies and kinetic energies are equal then displacement of an object in SHM is (a) 4 (b) 0 (c) 2 (d)6 28-If the time period of a simple pendulum is 2 s then it's length is (a) 1.02m (b) 1.2m (c) 1.4m (d) 1.5m 29-The restoring force pushes or pulls the oscillatory object (a) towards mean position (b) away from mean position (c) at central point (d) extreme point 30- An object at rest may have (a) momentum (b) potential energy (c) velocity (d) kinetic energy
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