Question

1. a sleigh weighs 2,000 n and is pulled 1,000 m in 45 minutes. what is the power of the horse?

600 w
800 w
700 w
740 w

Explanation:

Step1: Calculate work done

Work \(W = F\times d\). Here, \(F = 2000\ N\) and \(d=1000\ m\). So, \(W=2000\times1000 = 2\times10^{6}\ J\)

Step2: Convert time to seconds

Time \(t = 45\ minutes\). Since \(1\ minute=60\ seconds\), \(t = 45\times60=2700\ s\)

Step3: Calculate power

Power \(P=\frac{W}{t}\). Substituting \(W = 2\times10^{6}\ J\) and \(t = 2700\ s\), \(P=\frac{2\times10^{6}}{2700}\approx 740.74\ W\approx740\ W\)

Answer:

740 W