AP EAMCET202123 Aug 2021Morning ShiftPhysicsMotion in One DimensionActual
The velocity of a particle is given by v=2 t^2-8 t+15 ~ms ⁻¹ . Find its instantaneous acceleration at t=5 ~s .
Options
- A18 ~ms ⁻²
- B20 ~ms ⁻²
- C5 ~ms ⁻²
- D12 ~ms ⁻²
Correct answer
D. 12 ~ms ⁻²
Step-by-step solution
Given, velocity, v=2 t^2-8 t+15 time, t=5 ~s Let acceleration be a . aligned & a= d v d t & a=4 t- .8 |_ t=5 & =4 5-8 & =20-8 & =12 ~ms ⁻² aligned