Advertisements
Advertisements
Question
Correct your friend who says that acceleration gives the idea of how fast the position changes.
Solution
There are two possible answers:
Velocity gives an idea of how fast the position changes, or Acceleration gives an idea of how fast the velocity changes.
APPEARS IN
RELATED QUESTIONS
An object of mass 16 kg is moving with an acceleration of 3 m/s2. Calculate the applied force. If the same force is applied to an object of mass 24 kg, how much will be the acceleration?
Define acceleration. State its unit.
A bullet initially moving with a velocity 20 m/s strikes a target and comes to rest after penetrating a distance 10 cm into the target. Calculate the retardation caused by the target.
A train starts from rest and accelerates uniformly at a rate of 2 m s-2 for 10 s. It then maintains a constant speed for 200 s. The brakes are then applied and the train is uniformly retarded and comes to rest in 50 s. Find
(i) The maximum velocity reached,
(ii) The retardation in the last 50 s,
(iii) The total distance travelled,
(iv) The average velocity of the train.
A car travels with uniform velocity of 25 m s-1 for 5 s. The brakes are then applied and the car is uniformly retarded and comes to rest in further 10 s. Find:
- The distance which the car travels before the brakes are applied,
- Retardation and
- The distance travelled by car after applying the brakes.
Explain the following concept in your own words with everyday examples:
Acceleration
State its value in C.G.S. as well as in S.I. system.
From the diagram given below, calculate acceleration.
A motor bike running at 5 ms−1, picks up a velocity of 30 ms−1 in 5s. Calculate
- acceleration
- distance covered during acceleration.
Define acceleration.
The acceleration of a body is 8.5 ms-2. What does this statement mean?
State if the following situation is possible:
A body moving with constant acceleration but with Zero velocity.
State if the following situation is possible:
A body moving with a constant velocity in an accelerated motion.
A body has an acceleration of -3.5 ms-2. What is its retardation?
Convert the following acceleration:
7200 km/h2 into m/s2
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
What do you mean by constant acceleration?
A boy throws a ball up and catches it when the ball falls back. In which part of the motion the ball is accelerating?
An object can be moving with uniform speed but with variable acceleration.
