Advertisements
Advertisements
प्रश्न
A car starts from rest and it is travelling with a velocity of 20 m/s in 10 s. What is its acceleration?
Advertisements
उत्तर
Given :
Initial velocity of the car (u) = 0 m/s
Final velocity of the car (v) = 20 m/s
time taken = 10s
Acceleration = ?
Formula:
Acceleration = \(\frac {20– 0}{10}\) = \(\frac {20}{10}\)
Acceleration of the car = 2 m/s2
APPEARS IN
संबंधित प्रश्न
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 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?
From the diagram given below, calculate acceleration.

From the diagram given below, calculate deceleration.

From the velocity – time graph given below, calculate deceleration in region BC.

Diagram is given below shows velocity – time graph of car P and Q, starting from the same place and in the same direction. Calculate the Acceleration of car P.

What does a positive acceleration mean?
State if the following situation is possible:
A body moving with constant acceleration but with Zero velocity.
Interpret the following graph:
Figure represents graphically the velocity of a car moving along a straight road over a period of 100 hours.
Calculate the acceleration along AB and the retardation along BC.
What do you understand about negative acceleration?
Exercise Problem.
A racing car has a uniform acceleration of 4 ms–2. What distance it covers in 10 s after the start?
If the velocity of a body does not change, then its acceleration is ______.
The Unit of acceleration is ______.
The acceleration of the body that moves with a uniform velocity will be ______.
m/s2 is the unit of ______.
A boy throws a ball up and catches it when the ball falls back. In which part of the motion the ball is accelerating?
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.
Assertion: Position-time graph of a stationary object is a straight line parallel to the time axis.
Reason: For a stationary object, the position does not change with time.
