Advertisements
Advertisements
प्रश्न
Express 15 m s-1 in km h-1.
Advertisements
उत्तर
1 Km = 1000 m
1 m = `1/1000` Km
1 hour = 60 min = 60 x 60 sec
1 hour = 3600 sec
∴ 15 m/s = `15/1000 xx 3600` km/hr
∴ 15 m/s = 54 km/hr-1
APPEARS IN
संबंधित प्रश्न
Joseph jogs from one end A to the other end B of a straight 300 m road in 2 minutes 30 seconds and then turns around and jogs 100 m back to point C in another 1 minute. What are Joseph’s average speeds and velocities in jogging?
- from A to B and
- from A to C?
Name the physical quantity which gives us an idea of how slow or fast a body is moving.
Arrange the following speed in increasing order (keeping the least speed first):
An athlete running with a speed of 10 m/s.
A motorcyclist drives from place A to B with a uniform speed of 30 km h-1 and returns from place B to A with a uniform speed of 20 km h-1. Find his average speed.
If a bus travelling at 20 m/s is subjected to a steady deceleration of 5 m/s2, how long will it take to come to rest ?
A car is moving along a straight road at a steady speed. It travels 150 m in 5 seconds:
How far does it travel in 1 second ?
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.
The tip of seconds’ hand of a dock takes 60 seconds to move once on the circular dial of the clock. If the radius of the dial of the clock be 10.5 cm, calculate the speed of the tip of the seconds’ hand of the clock. `("Given" π= 22/7)`.
For the motion with uniform velocity , how is the distance travelled related to the time ?
Define uniform velocity and give one example.
