Advertisements
Advertisements
प्रश्न
How will the equations of motion for an object moving with a uniform velocity change?
उत्तर
For an object moving with a uniform velocity, acceleration a = 0.
∴ Equation of motions v = u + at, s = `"ut" + 1/2 "at"^2`
and v2 − u2 = 2as change to v = u, s = ut and v = u
APPEARS IN
संबंधित प्रश्न
Fill in the following blank with suitable word :
Velocity is the rate of change of……………………… It is measured in.............. .
What conclusion can you draw about the velocity of a body from the displacement-time graph shown below :
Explain why, the motion of a body which is moving with constant speed in a circular path is said to be accelerated.
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 ?
A bus was moving with a speed of 54 km/h. On applying brakes it stopped in 8 seconds. Calculate the acceleration.
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 packet is dropped from a stationary helicopter, hovering at a height ‘h’ from ground level, reaches the ground in 12s. Calculate
- the value of h
- final velocity of packet on reaching the ground. (Take g = 9.8 ms−2)
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)
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.