Advertisements
Advertisements
Question
The speed of a car increases from 10 km/h to 64 km/h in 10 seconds. What will be its acceleration?
Advertisements
Solution
Initial velocity u = 10 km/hr. = (10 X 1000)/3600 = 8.33 ms-1.
Final velocity = 64 km/hr = (64 X 1000)/3600 = 17.77 ms-1.
Time = 10 s.
Acceleration = (v-u)/t = (17.77- 8.33)/10 = 9.44/10 = 0.94 ms-2.
APPEARS IN
RELATED QUESTIONS
Define the term acceleration due to gravity. State its average value.
The unit of retardation is ____________
When is the acceleration due to gravity positive?
A motor bike running at 90 kmh−1 is slowed down to 18 kmh−1 in 2.5 s. Calculate
- acceleration
- distance covered during slow down.
State if the following situation is possible:
A body moving horizontally with an acceleration in vertical direction.
The speed of a particle is constant. Will it have acceleration? Justify with an example.
When an object undergoes acceleration ______.
Acceleration is a scalar.
Assertion: A positive acceleration of a body can be associated with the slowing down of the body.
Reason: Acceleration is a vector.
When a body is said to be in
- uniform acceleration
- non–uniform acceleration?
