Advertisements
Advertisements
प्रश्न
Out of energy and acceleration, which one is a vector?
Advertisements
उत्तर
Acceleration is a vector quantity.
APPEARS IN
संबंधित प्रश्न
Give a scientific reason.
When an object falls freely to the ground, its acceleration is uniform.
What is meant by the term retardation? Name its S.I. unit.
State the type of motion represented by the following sketches in Figures.

Give an example of each type of motion.
A body falls freely from a certain height. Show graphically the relation between the distance fallen and square of time. How will you determine g from this graph?
A vehicle is accelerating on a straight road. Its velocity at any instant is 30 km/h. After 2 s, it is 33.6 km/h, and after further 2 s, it is 37.2 km/h. Find the acceleration of the vehicle in m s-2. Is the acceleration uniform?
A motor bike running at 5 ms−1, picks up a velocity of 30 ms−1 in 5s. Calculate
- acceleration
- distance covered during acceleration.
A car accelerates to a velocity of 30 m/s in 10 s and then decelerates for 20 s so that it stops. Draw a velocity-time graph to represent the motion and find:
Distance travelled
A car starts from rest and it is travelling with a velocity of 20 m/s in 10 s. What is its acceleration?
The slope of a velocity-time graph gives ______.
Assertion: A negative acceleration of a body can be associated with speeding up of the body.
Reason: Increase in the speed of a moving body is independent of its direction of motion.
