Saved Bookmarks
| 1. |
A particle is projected upwards with Speed 2 metre per second square at time t is equal to zero at what time will be the speed of particle be half the initial speed |
|
Answer» At time t = 0.102 sec VELOCITY of particle will BECOME half of its initial velocity.Explanation:Initial velocity of particle (at time t=0) is u = 2 m/s Particle is moving UPWARD.ACCELERATION due to gravity for motion of particle would be taken as, g = -9.8 m/s²[ Negative acceleration due to gravity because particle is moving upward]we need to FIND the time when the speed of particle will be half the initial speed.means., final velocity, v = 1 m/s Using the first equation of motion→ v = u + a t→ 1 = 2 + (-9.8) × t → 1 - 2 = -9.8 t→ -1 = -9.8 t→ t = 0.102 sec [ Approx. ]Therefore,At time t = 0.102 seconds., the velocity of the particle will become half of the initial velocity. |
|