Advertisements
Advertisements
प्रश्न
When will you say a body is at non-uniform acceleration?
Advertisements
उत्तर
- A body is said to have non-uniform acceleration if it travels in a straight path in such a way that its velocity changes at a non-uniform rate.
- i.e., the velocity of a body increases or decreases in unequal amounts in an equal interval of time.
APPEARS IN
संबंधित प्रश्न
A bus running at a speed of 18 km/h is stopped in 2.5 seconds by applying brakes. Calculate the retardation produced.
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 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 :
A bus increases its speed from 36 km/h to 72 km/h in 10 seconds. Its acceleration is :
Derive the following equations for uniformly accelerated motion:
(i) v = u + at
(ii) `"S = ut" + 1/2 "at"^2`
(iii) v2 = u2 + 2aS
where the symbols have their usual meanings.
A body, initially at rest, starts moving with a constant acceleration 2 m s-2. Calculate: (i) the velocity acquired and (ii) the distance travelled in 5 s.
Can you suggest a real-life example about the motion of a body from the following velocity – time graph?
A stone thrown vertically upwards takes 3 s to attain maximum height. Calculate
- initial velocity of the stone
- maximum height attained by the stone. (Take g = 9.8 ms−2)
How will the equations of motion for an object moving with a uniform velocity change?
Draw a velocity versus time graph of a stone thrown vertically upwards and then coming downwards after attaining the maximum height.
