Explanation:
The given data is as follows.
Height, h = 40 m, F = 160 N
Time, t = 10 sec, Work, w = ?
Calculate the work by using the formula as follows.
Work = Force × displacement
= 160 N × 40 m
= 6400 J
Now, calculate the average speed as follows.
Potential energy = Kinetic energy
m × g × h = [tex]\frac{1mv^{2}}{2}[/tex]
Cancelling mass, m from both the sides the relation will become:
g × h = [tex]\frac{1v^{2}}{2}[/tex]
or, v = [tex]\sqrt {2gh}[/tex]
= [tex]\sqrt {2 \times 9.8 m/s^{2} \times 40 m}[/tex]
= [tex]\sqrt {784}[/tex] m/s
= 28 m/s
Thus, we can conclude that work done is 6400 J and average speed is 28 m/s.
Question: What is the distance?
Explanation: The person above did not say.
