Advertisements
Advertisements
प्रश्न
The figure shows the displacement - time graph for four bodies A, B C and D. In each case state what information do you get about the acceleration (zero, positive or negative).
Advertisements
उत्तर
For body A: The graph is a straight line. So, the slope gives constant velocity. Hence, the acceleration for body A is zero.
For body B: The graph is a straight line. So, the slope gives constant velocity. Hence, the acceleration for body B is also zero.
For body C: The slope of the graph is decreasing with time. Hence, the acceleration is negative.
For body D: The slope of the graph is increasing with time. Hence, the acceleration is positive.
APPEARS IN
संबंधित प्रश्न
When will you say a body is at non-uniform acceleration?
Which of the two can be zero under certain conditions : average speed of a moving body or average velocity of a moving body ?
Give one example of a situation in which a body has a certain average speed but its average velocity is zero.
Fill in the following blank with suitable word :
If a body moves with uniform velocity, its acceleration is ..............
Describe the motion of a body which is accelerating at a constant rate of 10 m s–2. If the body starts from rest, how much distance will it cover in 2 s ?
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 :
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?
When is the positive acceleration?
Can you suggest a real-life example about the motion of a body from the following velocity – time graph?
