a 50-n force acts on a 2-kg crate that starts from rest. when the force has been acting for 2s 1250 W
What is force?
A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.
[tex]\begin{aligned}& F=50 \mathrm{~N} \\& m=2 \pi g \\& u=0 \\& t=2 s . \\& P=? \\& P=\frac{W}{t} \\& F=m a \\& 50=2 a \\& \Rightarrow a=25 \mathrm{~m}^2 s^2 \\& s=u t+\frac{1}{2} a t^2 \\& s=0(2)+\frac{1}{2}(25 \times 2)(x)=50 \mathrm{~m} \\& W=F \times s \\& =50 \times 50=2500 \\& P=\frac{\omega}{t}=\frac{2500}{2}=1250 \mathrm{~W}\end{aligned}[/tex]
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