Advertisements
Advertisements
प्रश्न
A quantity is measured to be -30 m/s. Is it speed or velocity?
Advertisements
उत्तर
-30 m/s is speed.
APPEARS IN
संबंधित प्रश्न
Which is greater?
(i) 36 km/hr
(ii) 8.5 m/s
Can the speed of a body be negative?
A girl had designed a clap switch for a science exhibition that enabled her to switch on or off an alarm just with clapping of hands. While testing her device in a hall, she noticed that once the alarm has sounded it followed with another one due to echo of the clap, that is, the sound reflected by the walls. She recorded the two soundings of alarm with her tape recorder and found out that time difference in between them is 0.1 s. If the distance of the walls be 15 m, calculate the speed of sound.
For a body moving along a circular path, show that:
Linear speed = Angular velocity X radius of the circle
Suppose a boy is enjoying a ride on a merry go round which is moving with a constant speed of 10 m/s. It implies that the boy is
Every object moves with a constant speed.
Speed is always positive or zero but never be ______.
A car increases its speed from 20 km/h to 50km/h in 10 seconds. Its acceleration is ______.
A car starting from rest moves with a uniform acceleration of 0.2 ms-2 for 3 min. Find the
- speed acquired
- the distance traveled.
Distinguish between Speed and velocity.
