Advertisements
Advertisements
प्रश्न
Convert a speed of 54 km/h into m/s.
Advertisements
उत्तर
We have to convert 54 km/h into m/s .
54 km/hr = `((54)(1000))/3600` m/s
= 15 m/s
APPEARS IN
संबंधित प्रश्न
Abdul, while driving to school, computes the average speed for his trip to be 20 km h−1. On his return trip along the same route, there is less traffic and the average speed is 30 km h−1. What is the average speed for Abdul’s trip?
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.
A train starting from rest moves with a uniform acceleration of 0.2 m/s2 for 5 minutes. Calculate the speed acquired and the distance travelled in this time.
A car is moving on a straight road with uniform acceleration. The speed of the car varies with time as follows :
Time (s) : 0 2 4 6 8 10
Speed (m/s) : 4 8 12 16 20 24
Draw the speed-time graph by choosing a convenient scale. From this graph :
(1) Calculate the acceleration of the car.
(2) Calculate the distance travelled by the car in 10 seconds.
Give an example of the motion of a body moving with a constant speed but with a variable velocity. Draw a diagram to represent such a motion.
Express the following in m s−1.
1 km h−1
A car travels the first 30 km with a uniform speed of 60 km h−1 and the next 30 km with a uniform speed of 40 km h−1. Calculate :
- The total time of journey,
- The average speed of the car.
A speeding car changes its velocity from 108 kmh−1 to 36 kmh−1 in 4 s. Calculate its deceleration in
- ms−2
- kmh−2.
Write down the type of motion of a body along with the A – O – B of the following distance – time graph.
