v2 = ?
m1 = 10kg
m2 = 70kg
v1 = 4m/s
E1 = E2
E1 = 1/2 * m1 * v1^2 = 1/2 * 10kg * 4m/s^2 = 80J
E2 = 1/2 * m2 * v2^2 = 80 J
v2 = √(E2/(2 * m2)) = √(80J/(2 * 70kg)) = about 0.76m/s
The amount of energy transferred is 4320 J
Explanation:
Power is defined as the amount of energy transferred per unit of time:
where
P is the power
E is the amount of energy transferred
t is the time
In this problem, we have:
P = 720 W is the power
t = 6 s is the time elapsed
Solving for E, we find the energy transferred needed to push the box:
Learn more about power:
brainly.com/question/7956557
#LearnwithBrainly
Answer:
Creating a police department
Explanation:
Well through process of elimination, I doubt a local government has authority over the military, economy, or relationships with countries.
Answer:
Charge on the sphere will be equal to
Explanation:
We have given radius of the sphere a = 13 cm
And electric filed 21 cm from the center is
So distance from the center r = 21 cm
We have to find the charge on the sphere
As
So according to Gauss law electric field is equal to
So
So charge on the sphere will be equal to
Answer:
24 mph
Explanation:
Speed = Distance / Time
Speed = 20 ÷ 5/6
Speed = 24 mph
NOTE: 5/6 is a fraction in this case and is equivalent to 50/60 and 60 minutes = 1 hour of course.
Hope this helped!