Advertisements
Advertisements
Question
A bus decreases its speed from 80 km h−1 to 60 km h−1 in 5 s. Find the acceleration of the bus.
Advertisements
Solution
Initial velocity = 80km/h
= 80 × 100060 × 60
= 22.22 m/s
Time = 5s
Final velocity v = 60 km/h
= 60 × 100060 × 60
= 16.66 m/s
Acceleration = `"Change in velocity"/"Time taken"`
= `"(Final velocity - Initial velocity)"/"Time taken"`
= `(16.66-22.22 )/5`
= -1.11ms-2
Hence, acceleration of the bus = -1.11ms-2
APPEARS IN
RELATED QUESTIONS
When will you say a body is at non-uniform acceleration?
A cheetah starts from, rest, and accelerates at 2 m/s2 for 10 seconds. Calculate :
(a) the final velocity
(b) the distance travelled.
A body starts from rest and acquires a velocity 10 m s-1 in 2 s. Find the acceleration.
A car starting from rest acquires a velocity 180m s-1 in 0.05 h. Find the acceleration.
The velocity-time graph of a body in motion is a straight line inclined to the time axis. The correct statement is ___________
What do you understand by the term acceleration?
Multiple choice Question. Select the correct option.
A body dropped from the top of a tower reaches the ground in 4s. Height of the tower is
Multiple choice Question. Select the correct option.
The speed of a car reduces from 15 m/s to 5 m/s over a displacement of 10 m. The uniform acceleration of the car is :
Multiple choice Question. Select the correct option.
At the maximum height, a body thrown vertically upwards has :
Can you suggest a real-life example about the motion of a body from the following velocity – time graph?
