Answer:
77.3W (to 3sf)
Explanation:
weight = mass × gravtaional field strength
= 6.35kg × 10N/kg
= 63.5N
weight = force = 63.5N
work done = force × distance
= 63.5N × 5.11m
= 324.485J
power = [tex]\frac{work done}{elapsed time}[/tex]
= [tex]\frac{324.485J}{4.2s}[/tex]
= 77.3W (to 3sf)
