Question

The displacement of a particle along the X-axis is given as
x=5t2+1
, where x is in metres and t in seconds. Calculate its instantaneous velocity 2 s.

46 m/s

40 m/s

20 m/s

25 m/s

Answer 1

Answer on question #51916, Physics, Field Theory

Question The displacement of a particle along the X-axis is given as $x=5t^{2}+1$ where x is in metres and t in seconds. Calculate its instantaneous velocity 2 s.

46 m/s

40 m/s

20 m/s

25 m/s

Solution Velocity is first derivative of displacement

$v=x^{\prime}=10t$

Hence, at 2 s:

$v_{2s}=10\cdot 2=20m/s$

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