Advertisements
Advertisements
प्रश्न
A train starting from a railway station and moving with uniform acceleration attains a speed 40 km h−1 in 10 minutes. Find its acceleration.
उत्तर
Here, initial speed, u = 0
Final speed, v = 40 km h-1
= `(40 xx 1000)/(60 xx 60)`
= 11.11 ms-1
Time taken, t = 10 × 60s
= 600s
Acceleration,
a = `(v - u)/t`
= `(11.11-0)/600`
= 1.85 × 10-2 ms-2
APPEARS IN
संबंधित प्रश्न
Describe the motion of a body which is accelerating at a constant rate of 10 m s–2. If the body starts from rest, how much distance will it cover in 2 s ?
A car is travelling along the road at 8 ms-1. It accelerates at 1 ms-2 for a distance of 18 m. How fast is it then travelling ?
When a car driver travelling at a speed of 10 m/s applies brakes and brings the car to rest in 20 s, then retardation will be :
If a stone and a pencil are dropped simultaneously in vacuum from the top of a tower, then which of the two will reach the ground first? Give reason.
A car starting from rest acquires a velocity 180m s-1 in 0.05 h. Find the acceleration.
The figure shows the displacement - time graph for four bodies A, B C and D. In each case state what information do you get about the acceleration (zero, positive or negative).
When is the negative 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
How can you find the following?
Acceleration from velocity – time graph.
Area under a v – t graph represents a physical quantity which has the unit
