Advertisements
Advertisements
Question
Give one example of a motion where an object does not change its speed but its direction of motion changes continuously.
Advertisements
Solution
The motion of an artificial satellite around the earth is an example of a motion (uniform circular motion) where an object does not change its speed but its direction of motion changes continuously.
APPEARS IN
RELATED QUESTIONS
Under what condition(s) is the magnitude of average velocity of an object equal to its average speed?
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.
Write the formula for acceleration. Give the meaning of each symbol which occurs in it.
A tortoise moves a distance of 100 metres in 15 minutes. What is the average speed of tortoise in km/h ?
A car is moving along a straight road at a steady speed. It travels 150 m in 5 seconds:
How long does it take to travel 240 m ?
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 car is moving with a velocity 20 m s-1. The brakes are applied to retard it at a rate of 2 m s-2. What will be the velocity after 5 s of applying the brakes?
Define uniform velocity and give one example.
