Advertisements
Advertisements
Question
What is meant by the term retardation? Name its S.I. unit.
Advertisements
Solution
Retardation is the decrease in velocity per second.
Its SI unit is metre/second2 (m/s2).
APPEARS IN
RELATED QUESTIONS
Give a scientific reason.
When an object falls freely to the ground, its acceleration is uniform.
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?
The velocity-time graph for a uniformly retarded body is a straight line inclined to the time axis with an obtuse angle. How is retardation calculated from the velocity-time graph?
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.
State its value in C.G.S. as well as in S.I. system.
A truck running at 90 kmh−1, is brought to rest over a distance of 25 m. Calculate the retardation and time for which brakes are applied.
Out of energy and acceleration, which one is a vector?
The Unit of acceleration is ______.
A bus accelerating with 4ms-2 changes its speed from 60ms_1 to a certain value in 5s. The final speed is ______.
A boy throws a ball up and catches it when the ball falls back. In which part of the motion the ball is accelerating?
