Advertisements
Advertisements
प्रश्न
Find the initial velocity of a car which is stopped in 10 seconds by applying brakes. Retardation due to brakes is 2.5 ms-2.
टीपा लिहा
उत्तर
Let initial velocity be u.
Final velocity is v= 0 m/s.
Time taken by body to come to rest = 10 sec.
Retardation =2.5 ms-2.
We know v = u +at.
Then u = v - at.
u = 0 - (-2.5 X 10) = 25 m/s.
So initial velocity of the body is 25 m/s.
shaalaa.com
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
APPEARS IN
संबंधित प्रश्न
Complete the following table.
| u (m/s) | a (m/s2) | s (m) | v2 = u2 + 2as (m/s)2 |
| 4 | 3 | ______ | 8 |
| ______ | 5 | 8.4 | 10 |
Derive the equations of motion by graphical method.
Complete the following table.
| u (m/s) | a (m/s2) | t (sec) | v = u + at (m/s) |
| 2 | 4 | 3 | ______ |
| ______ | 5 | 2 | 20 |
Complete the following table.
| u (m/s) | a (m/s2) | t (sec) | s = ut + `1/2`at2 (m) |
| 5 | 12 | 3 | ______ |
| 7 | ______ | 4 | 92 |
