Advertisements
Advertisements
प्रश्न
A car is moving with a speed of 50 km/h. One second later, its speed is 55 km/h. What is its acceleration?
Advertisements
उत्तर
Initial speed of car u = 50 km/h.
Final speed of car v = 55 km/h.
Time taken by car to attain this speed is = 1 sec. = 1/3600 hr.
Acceleration of the car is = (55 - 50 )X 3600 = 18000 kmh-2.
APPEARS IN
संबंधित प्रश्न
Give a scientific reason.
When an object falls freely to the ground, its acceleration is uniform.
A toy car initially moving with uniform velocity of 18 km h-1 comes to a stop in 2 s. Find the retardation of the car in S.I. units.
Figure shows the velocity-time graphs for two cars A and B moving in the same direction. Which car has greater acceleration? Give reasons to your answer.
A train moving with a velocity of 20 ms−1 is brought to rest by applying brakes in 5 s. Calculate the retardation.
A vehicle is accelerating on a straight road. Its velocity at any instant is 30 km/h. After 2 s, it is 33.6 km/h, and after further 2 s, it is 37.2 km/h. Find the acceleration of the vehicle in m s-2. Is the acceleration uniform?
What is the SI unit of acceleration?
Write the SI unit of acceleration and retardation.
What happens to the stepwise increasing speed-time graph when the size of each step is made very small?
The graph shows how the velocity of a scooter varies with time in 50 s.
Work out: Acceleration.
An object can be moving with uniform speed but with variable acceleration.
