Advertisements
Advertisements
Question
Express the following in m s-1.
18 km min-1
Solution
18 km min-1
1 km = 1000 m
1 min = 60 s
∴ 18 km min-1 = `18 xx 1000/60` = 300 ms-1
APPEARS IN
RELATED QUESTIONS
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 ?
A car travels 100 km at a speed of 60 km/h and returns with a speed of 40 km/h. Calculate the average speed for the whole journey.
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.
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 moving on a straight path covers a distance of 1 km due east in 100 s. What is velocity of the car?
Figure shows the displacement of a body at different times .
Calculate the velocity of the body as it moves for time interval :
(i) 0 to 5 s,
(ii) 5 s to 7 s
(iii) 7 s to 9 s.
Figure shows the displacement of a body at different times .
Calculate the average velocity during the time interval 5 s to 9 s ,
[Hint : From 5 s to 9 s , displacement = 7 m - 3m = 4m]
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:
How many variables are present in each equation of motion?
