Advertisements
Advertisements
प्रश्न
When is the positive acceleration?
Advertisements
उत्तर
When the velocity of a body increases with time, then the acceleration of the body is said to be positive acceleration.
APPEARS IN
संबंधित प्रश्न
Name the quantity which is measured by the area occupied under the velocity-time graph.
A body starting from rest travels with uniform acceleration. If it travels 100 m in 5 s, what is the value of acceleration ?
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 bus increases its speed from 36 km/h to 72 km/h in 10 seconds. Its acceleration is :
Differentiate between uniform acceleration and variable acceleration.
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 bicycle initially moving with a velocity 5.0 m s-1 accelerates for 5 s at a rate of 2 m s-2. What will be its final velocity?
What do you understand by the term acceleration?
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)
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?
