a particle moves along a straight line with equation of motion s=f(t), where s i

Question

a particle moves along a straight line with equation of motion s=f(t), where s is measured in meters and t in seconds. find the velocity and the speed when t=5.
F(t)=20t-8t^2
Velocity= Speed= a particle moves along a straight line with equation of motion s=f(t), where s is measured in meters and t in seconds. find the velocity and the speed when t=5.
F(t)=20t-8t^2
Velocity= Speed= a particle moves along a straight line with equation of motion s=f(t), where s is measured in meters and t in seconds. find the velocity and the speed when t=5.
F(t)=20t-8t^2
Velocity= Speed=

Explanation / Answer

f(t)=20t-8t^2

Velocity=df/dt =20-16t

at t=5 ==>Velocity =20-16*5 ==>20-80=-60m/s

Speed=60m/s

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