Advertisements
Advertisements
प्रश्न
A bus decreases its speed from 80 km h−1 to 60 km h−1 in 5 s. Find the acceleration of the bus.
उत्तर
Initial velocity = 80km/h
= 80 × 100060 × 60
= 22.22 m/s
Time = 5s
Final velocity v = 60 km/h
= 60 × 100060 × 60
= 16.66 m/s
Acceleration = `"Change in velocity"/"Time taken"`
= `"(Final velocity - Initial velocity)"/"Time taken"`
= `(16.66-22.22 )/5`
= -1.11ms-2
Hence, acceleration of the bus = -1.11ms-2
APPEARS IN
संबंधित प्रश्न
Which of the two can be zero under certain conditions : average speed of a moving body or average velocity of a moving body ?
Fill in the following blank with suitable word :
A motorcycle has a steady……………. of 3 m/s2. This means that every………………. its…………….. increases by………….
What is meant by the term acceleration ? State the SI unit of acceleration.
What conclusion can you draw about the velocity of a body from the displacement-time graph shown below :
Fill in the following blank with suitable word :
If a body moves with uniform velocity, its acceleration is ..............
Derive the formula : v = u + at, where the symbols have usual meanings.
Derive the formula s= `ut+1/2at^2` , where the symbols have usual meanings.
The velocity-time graph of a body in motion is a straight line inclined to the time axis. The correct statement is ___________
Can you suggest a real-life example about the motion of a body from the following velocity – time graph?
A body is thrown vertically upward with velocity u, the greatest height h to which it will rise is,
