Advertisements
Advertisements
प्रश्न
Which of the following can sometimes be 'zero' for a moving body?
(i) average velocity
(ii) distance travelled
(iii) average speed
(iv) displacement
पर्याय
only (i)
(i) and (ii)
(i) and (iv)
only (iv)
Advertisements
उत्तर
(i) and (iv)
Distance is the length of the actual path covered by a moving body. This implies that the distance travelled by a moving body and also its average speed can never be zero at any point of time. However, it is possible for the displacement as well as average velocity for the body to be zero at an instance during the motion of the particle.
APPEARS IN
संबंधित प्रश्न
What name is given to the speed in a specified direction ?
Name the physical quantity which gives us an idea of how slow or fast a body is moving.
Write the formula to calculate the speed of a body moving along a circular path. Give the meaning of each symbol which occurs in it.
Which of the following could not be a unit of speed?
A car moving on a straight path covers a distance of 1 km due east in 100 s. What is velocity of the car?
A car is moving with a velocity 20 m s-1. The brakes are applied to retard it at a rate of 2 m s-2. What will be the velocity after 5 s of applying the brakes?
The velocity-time graph of a moving body is given below in Figure
Displacement in each part AB, BC and CD.
What is the relation between distance and time when the body is moving with variable velocity?
A body projected vertically up with a velocity of 10 m/s reaches a height of 20 m. If it is projected with a velocity of 20 m/s, then the maximum height reached by the body is:
A motorcyclist drives from A to B with a uniform speed of 30 km h–1 and returns back with a speed of 20 km h–1. Find its average speed.
