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
Name the quantity which is measured by the area occupied under the velocity-time graph.
A motorcycle moving with a speed of 5 m/s is subjected to an acceleration of 0.2 m/s2. Calculate the speed of the motorcycle after 10 seconds, and the distance travelled in this time.
A car is travelling along the road at 8 ms-1. It accelerates at 1 ms-2 for a distance of 18 m. How fast is it then travelling ?
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 :
If a stone and a pencil are dropped simultaneously in vacuum from the top of a tower, then which of the two will reach the ground first? Give reason.
A body starts from rest and acquires a velocity 10 m s-1 in 2 s. Find the acceleration.
When is the positive acceleration?
Can you suggest a real-life example about the motion of a body from the following velocity – time graph?

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?
