Answer :
Answer:
b. 5.0 m
Explanation:
Power: Power can be defined as the rate at which work is done.
The S.I unit of power is watt (W).
P = W/t ............................................... Equation 1
Where p = power, W = work, t = time.
But
W = F×d..................................... Equation 2
Where F = force, d = maximum distance.
Substituting equation 2 into equation 1
P = F×d/t
making d the subject of the equation above,
d = Pt/F......................................................... Equation 3
Given: F = 90 Newton, P = 60 watt, t = 7.5 seconds.
Substituting these values into equation 3,
d = 60×7.5/90
d = 5 m
Thus the maximum distance is = 5 m
The right option is b. 5.0 m