PH-1479

Resultant force and F = ma

Physics · Secondary 4 · Hard · Resultant force and F = ma

A 0.80 kg toy car is pulled along a straight track by a constant horizontal force. Its speed increases uniformly from 0.50 m/s to 2.1 m/s in 4.0 s.

What is the magnitude of the pulling force?

$0.20\,\text{N}$
$0.32\,\text{N}$
$0.80\,\text{N}$
$3.2\,\text{N}$

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