Advertisements
Advertisements
Question
A boy is sitting on a merry-go-round which is moving with a constant speed of 10 m s−1. This means that the boy is :
Options
at rest
moving with no acceleration
in accelerated motion
moving with uniform velocity
Advertisements
Solution
in accelerated motion
Acceleration is the rate of change of velocity, and the velocity of the merry-go-round is changing with respect to time. Thus, it will move in an accelerated motion.
APPEARS IN
RELATED QUESTIONS
Fill in the following blank with a suitable word:
Acceleration is the rate of change of ______ It is measured in ______
What term is used to denote the change of velocity with time ?
A motorcycle moving with a speed of 5 m/s is subjected to an acceleration of 0.2 m/s2. Calculate the speed of the motorcycle after 10 seconds, and the distance travelled in this time.
A train starting from stationary position and moving with uniform acceleration attains a speed of 36 km per hour in 10 minutes. Find its acceleration.
A bus increases its speed from 36 km/h to 72 km/h in 10 seconds. Its acceleration is :
Differentiate between uniform acceleration and variable acceleration.
Give one example of following motion :
Variable acceleration
A bicycle initially moving with a velocity 5.0 m s-1 accelerates for 5 s at a rate of 2 m s-2. What will be its final velocity?
Can you suggest a real-life example about the motion of a body from the following velocity – time graph?
The velocity-time graph (Fig. 8.5) shows the motion of a cyclist. Find (i) its acceleration (ii) its velocity and (iii) the distance covered by the cyclist in 15 seconds.
