Advertisements
Advertisements
प्रश्न
A car starting from rest acquires a velocity 180m s-1 in 0.05 h. Find the acceleration.
Advertisements
उत्तर
Here, final velocity = 180 m/s
Initial velocity = 0 m/s
Time taken = 0.05 h or 180 s
Acceleration = (Final Velocity - Initial Velocity)/time
= (180-0)/180 m s-2
= 1 m s-2
APPEARS IN
संबंधित प्रश्न
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 :
Velocity is the rate of change of……………………… It is measured in.............. .
What is meant by the term acceleration ? State the SI unit of acceleration.
The slope of a speed-time graph gives:
State how the velocity-time graph can be used to find
The acceleration of a body
For a uniformly retarded motion, the velocity-time graph is _____________
How can you find the following?
Velocity from acceleration – time graph.
Can you suggest a real-life example about the motion of a body from the following velocity – time graph?

The velocity-time graph (Fig. 8.5) shows the motion of a cyclist. Find (i) its acceleration (ii) its velocity and (iii) the distance covered by the cyclist in 15 seconds.

An electron moving with a velocity of 5 × 104 ms−1 enters into a uniform electric field and acquires a uniform acceleration of 104 ms–2 in the direction of its initial motion.
(i) Calculate the time in which the electron would acquire a velocity double of its initial velocity.
(ii) How much distance the electron would cover at this time?
