Advertisements
Advertisements
प्रश्न
An aircraft travelling at 600 km/h accelerates steadily at 10 km/h per second. Taking the speed of sound as 1100 km/h at the aircraft’s altitude, how long will it take to reach the ‘sound barrier’ ?
Advertisements
उत्तर
Final velocity, v = 1100 km/h = 1100 × 5/18 = 305.55 m/s
Initial velocity, u = 600 km/h = 600 × 5/18 = 166.66 m/s
Acceleration = 10 km/h per second = 10 × 5/18 = 2.77 m/s2
Time taken by body,
v = u + at
t = (v - u)/a
t = (305.55 -166.66 )/2.77
t = 50.14 sec
t ≃ 50 sec
APPEARS IN
संबंधित प्रश्न
Abdul, while driving to school, computes the average speed for his trip to be 20 km h−1. On his return trip along the same route, there is less traffic and the average speed is 30 km h−1. What is the average speed for Abdul’s trip?
Name the physical quantity which gives us an idea of how slow or fast a body is moving.
State whether speed is a scalar or a vector quantity. Give reason for your choice.
Arrange the following speed in increasing order (keeping the least speed first
A scooter moving with a speed of 30 km/h.
Which of the following statement is correct regarding velocity and speed of a moving body?
Give one example of following motion :
Variable velocity
A speeding car changes its velocity from 108 kmh−1 to 36 kmh−1 in 4 s. Calculate its deceleration in
- ms−2
- kmh−2.
Write down the type of motion of a body along with the A – O – B of the following distance – time graph.
How many variables are present in each equation of motion?
Derive th e equation of motion.
S = ut+ `1/2` at2,
Where the symbols have their usual meanings
