Advertisements
Advertisements
Question
When will you say a body is at uniform acceleration?
Advertisements
Solution
- A body is said to have uniform acceleration if it travels in a straight path in such a way that its velocity changes at a uniform rate.
- i.e., the velocity of a body increases or decreases by equal amounts in an equal interval of time.
APPEARS IN
RELATED QUESTIONS
A bus decreases its speed from 80 km h−1 to 60 km h−1 in 5 s. Find the acceleration of the bus.
Fill in the following blank with suitable word :
A motorcycle has a steady……………. of 3 m/s2. This means that every………………. its…………….. increases by………….
A train travelling at 20 m s-1 accelerates at 0.5 m s-2 for 30 s. How far will it travel in this time ?
Derive the formula : v = u + at, where the symbols have usual meanings.
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).
For a uniformly retarded motion, the velocity-time graph is _____________
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?
Area under a v – t graph represents a physical quantity which has the unit
A girl walks along a straight path to drop a letter in the letterbox and comes back to her initial position. Her displacement–time graph is shown in Fig.8.4. Plot a velocity-time graph for the same.
