The amount of power required to move the 120 Kg person to a distance of 35 m in 150 s is 274.4 W
<h3>How to determin the power</h3>
Power is simply defined as the rate at which work is done. It can be expressed mathematically as
Power (P) = work (W) / time (t)
But
Work = force (F) × distance (d)
Therefore,
P = Fd / t
With the above formula, we can obtain the power as follow:
- Mass (m) = 120 Kg
- Distance (d) = 35 m
- Time (t) = 150 s
- Acceleration due to gravity (g) = 9.8 m/s²
- Force (F) = mg = 120 × 9.8 = 1176 N
- Power (P) = ?
P = Fd / t
P = (1176 × 35) / 150
P = 41160 / 150
P = 274.4 W
Thus, the power is 274.4 W
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Answer:
Emf induced i equal to 329.4 volt
Explanation:
Note : Here i think we have to find emf induced in the coil
Number of turns in the coil N= 180
Sides of square d = 30 cm = 0.3 m
So area of the square 
Magnetic field is changes from 0 to 1.22 T
Therefore 
Time interval in changing the magnetic field dt = 0.06 sec
Induced emf is given by
Answer: 14000 N
Explanation: i just did it on khan academy
Answer:
C. total heat energy of the substance has increased
Explanation:
This is because when there is a change in temperature, the heat energy of a substance either increases or decreases. If the temperature increases, its heat energy increases and if its temperature decreases, its heat enery decreases.
Answer:
6.36*10^-8 N
Explanation:
The magnitude of gravitational force of attraction is usually given by the formula
F = Gm1m2/r², where
F = magnitude of the force required
G = gravitational constant, 6.67*10^-11 m3 kg^-1 s^-2
m1 = mass of the first body, 72 kg
m2 = mass of the second body, 53 kg
r = radius between the bodies themselves, 2 m
Now, when we apply the formula directly, we get
F = (6.67*10^-11 * 72 * 53) / 2²
F = (6.67*10^-11 * 3816) / 4
F = 2.55*10^-7 / 4
F = 6.36*10^-8 N
