Question

the displacement x of particle is dependent on time t according to the relation x=3-5t+2t^2 If t is measured in seconds and x in metres find acceleration at t=4s​

Answer 1

Answer:

a = 4 m/s^2

Explanation:

displacement = ut + 1/2at^2

= x = 3 - 5t + 2t^2

Here 3 is a constant "-5" is u and

= 2t^2 = 1/2at^2

= 4t^2 = at^2

= Cancelling out t^2

= 4 = a

= acceleration = 4 m /s^2