<span>Many power plants in the United States use fossil fuels like natural gas and coal to generate energy, while others use nuclear power. </span>
Distance of a fall from rest = (1/2) (g) (Time²)
75 m = (1/2) (9.8 m/s²) (Time²)
75 m = (4.9 m/s²) (Time²)
Divide each side by (4.9 m/s²):
Time² = (75 m) / (4.9 m/s²)
Time² = (15.3) (s²)
Square-root both sides:
<em>Time = 3.91 seconds</em>
Answer:
245W
Explanation:
Given parameters:
Mass of his body = 50kg
Height of climb = 5m
Time = 10s
Unknown:
Power = ?
Solution:
Power is defined as the rate at which work is done;
Mathematically,
Power =
Work done = mgh
m is the mass
g is the acceleration due to gravity
h is the height
Work done = 50 x 9.8 x 5 = 2450J
Power =
= 245W
The answer is C because Class M stars are red
F = ma
F/a = m
(25 N) / (5 m/s2) = m
4 kg = m