an-engineer-claims-to-have-made-a-very-fast-toy-truck-lt-table-gt-make-a-sketch-

Question

An engineer claims to have made a very fast toy truck.

Do you think the acceleration is constant (make a sketch of a velocity-time graph of the toy's velocity (in m/s) as a function of time)? What is the average acceleration of the toy at (i) 0 and 1.5 s; (ii) 1.5 and 12 s (iii) 12 and 25 s?

Accepted Answer

Acceleration is not constant; a_av-i = 10 m/s²
a_av-ii = 5.98 m/s²
a_av-iii = 0.477 m/s²

Answer

Acceleration is not constant; a_av-i = 10 m/s²
a_av-ii = 14.5 m/s²
a_av-iii = 0.752 m/s²

Answer

Acceleration is constant; a_av-i = 10 m/s²
a_av-ii = 10 m/s²
a_av-iii = 10 m/s²

Answer

Acceleration is constant; a_av-i = 7.52 m/s²
a_av-ii = 7.52 m/s²
a_av-iii = 7.52 m/s²

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An engineer claims to have made a very fast toy truck.
Do you think the acceleration is constant (make a sketch of a velocity-time graph of the toy's velocity (in m/s) as a function of time)? What is the average acceleration of the toy at (i) 0 and 1.5 s; (ii) 1.5 and 12 s (iii) 12 and 25 s?