The weight of the box is irrelevant. The only thing that matters is how hard you push on it.
Since it's the only number given, let's assume that the 10 Newtons is the force you applied to the box,
and that by applying that force to the box, you were able to move it 5 meters in 2 seconds.
The work you did is [ force x distance ] = 10 x 5 = 50 joules.
The power is [ energy / time ] = 50/2 = 25 joules per second = 25 watts.
.47 watt
80 J
The person's speed is 2 meters per second. The power required for him to accomplish that depends on his weight, on his efficiency of movement, on whether he's moving horizontally or vertically, etc., all of which the question neglects to specify.
320 meters
1200j
.47 watt
300 W
gh
300 W
two watts a second
800 W
The work required to move the truck is 600 N (600 kg-m/sec2) times 30 meters = 18000 joules. If this is done in 15 seconds, the average power was 1200 watts (kg-m2/sec3).
80 J
320 meters
The person's speed is 2 meters per second. The power required for him to accomplish that depends on his weight, on his efficiency of movement, on whether he's moving horizontally or vertically, etc., all of which the question neglects to specify.
Direction is to the right. Magnitude is 10 Newtons.
1200j