Answer:
15 MW
Explanation:
Work done is a product of force and distance moved.
W=fd where f represnt force while d is distance
Substituting f with 5 kN and 3 000 for d then
W= 5*3000=15000 kW which is equivalent to 15 MW
Explanation:
The distance that a car travels down the interstate can be calculated with the following formula:
Distance = Speed x Time
(A) Speed of the car, v = 70 miles per hour = 31.29 m/s
Time, d = 6 hours = 21600 s
Distance = Speed x Time
D = 31.29 m/s × 21600 s
D = 675864 meters
or

(b) Time, d = 10 hours = 36000 s
Distance = Speed x Time
D = 31.29 m/s × 36000 s
D = 1126440 meters
or

(c) Time, d = 15 hours = 54000 s
Distance = Speed x Time
D = 31.29 m/s × 54000 s
D = 1689660 meters
or

Hence, this is the required solution.
Answer:
4200 kJ
10 kg/min
Explanation:
70 kW means 70 kJ per second. So in a minute, the amount of heat generated at the brake is:
70 kJ/s × 60 s/min = 4200 kJ
Heat = mass × specific heat capacity × increase in temperature
4200 kJ = m × 4.184 kJ/kg/C × 100 C
m = 10 kg
So every minute, 10 kg of water is heated. So the mass flow is 10 kg/min.
The air resistance and gravity pulling it down
Answer:
U=1.44 J
Explanation:
Given that
m = 3.7 kg
K = 450 N/m
X= 0.08 m
We know that spring stored potential energy(U) and this potential energy given as

By putting the values


U=1.44 J