Advertisements
Advertisements
Question
The speed of a car is 72 km h-1. Express it in m s-1.
Advertisements
Solution
Speed of car = 72 km h-1
Speed of car in ms-1
= `(72 xx 1000)/3600` = 20 m/s
APPEARS IN
RELATED QUESTIONS
A snail covers a distance of 100 metres in 50 hours. Calculate the average speed of snail in km/h.
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 ?
Convert a speed of 54 km/h into m/s.
Give one example of a motion where an object does not change its speed but its direction of motion changes continuously.
Which of the quantity-velocity or acceleration-determines the direction of motion?
Express the following in m s−1.
1 km h−1
A train takes 2 h to reach station B from station A, and then 3 h to return from station B to station A. The distance between the two stations is 200 km. Find:
The average speed,
The average velocity of the train.
A car accelerates at a rate of 5 m s-2. Find the increase in its velocity in 2 s.
A car is moving in a straight line with speed 18 km h-1. It is stopped in 5 s by applying the brakes. Find:
- the speed of car in m s-1
- the retardation and
- the speed of car after 2 s of applying the brakes.
A train travels with a speed of 60 km h-1 from station A to station B and then comes back with a speed 80 km h-1 from station B to station A. Find -
- The average speed
- The average velocity of the train.
