<span>Which of the following is the correct unit for time when calculating power in watts?
</span>
The correct unit for time when calculating power in watts is seconds. The answer is letter D. The rest of the choices do not answer the question above.
First we calculate the
effective radius R:
R = 1740+94 = 1834 km =
1.834E6 m
Then taking the mass of
the moon:<span>
M = mass of moon = 7.348E22 kg </span>
We then calculate the
period using the formula:<span>
<span>T = 2π√[R³/(GM)] = 7049.3 sec = 1.96 hr</span></span>
Answer:
539.55 N for both
Explanation:
F=ma
Mass is given at 55kg
And when finding gravitational force gravity's constant is an acceleration of 9.81m/s
F=(55)(9.81)
F= 539.55 N (for both)
Normal force cancels out gravitational force that's why we don't fall throught the floor.
We push down on the floor due to gravitational force but normal force keeps us upright pushing an equal amount back.
Given: Initial velocity 
Final Velocity 
To find : Height when jumpled 8.0 m/s upwards.
Solution: We already have values of initial velocity and final velocity.
We know, accereration due to gravity is given by 
.
It's negative because when jump it's in opposite direction.
Where h is the height when jumpled 8.0 m/s upwards.
Plugging values of 
64= 225 -19.6h
Subtracting both sides by 225.
64-225= 225 -19.6h-225.
We get,
-161 = -19.6h
Dividing both sides by -19.6, we get
h= 8.2143
Rounding to nearest tenth, we get
h= 8.2 meter.
His height is 8.2 meter when he is jumping 8.0 m/s upwards.
