I will say it is B; the Inverse square law.
Ohms has to do with electricity and the other 2 just have to do with regular physics.
Answer:
Explained
Explanation:
a) No, the keys were initially moving upward in the elevator only effects the initial velocity of the key and not the rate of change of velocity that is acceleration. So, the keys accelerate with the same acceleration as before.
b)Yes, keys will accelerate towards the floor faster if it is a constant speed than it is moving downward because if the elevator is accelerating downward, the downward change in velocity of the keys is at least partially matched by a downward change in the velocity of the of the elevator.
F= (speed)/(wavelength)
Therefore, speed = Frequency x wavelength
V = 68m/s
Answer:
Explanation:
Question 1:
Mass=1kg
Acceleration due to gravity=9.8m/s^2
Height=10m
on the before falling it has potential energy
Potential energy=mass x acceleration due to gravity x height
Potential energy=1 x 9.8 x 10
Potential energy=98 joules
Question 2:
Potential energy=kinetic energy base base on energy transformation
Kinetic energy=(mass x (velocity)^2)➗2
98=(1 x(velocity))^2 ➗ 2
Cross multiplying
98 x 2=(velocity)^2
196=(velocity)^2
Velocity=√(196)
Velocity=14
Velocity=14m/s
Calculate for the x and y-components of the velocities involved in this item.
2 mi/h (45° east)
x-component = (2 mi/h)(sin 45°)
= 1.41 mi/h
y-component = (2 mil/h)(cos 45°)
= 1.41 mi/h
4 mi/h (east)
x-component = 4 mi/h
y-component = 0 mi/h
Adding up the corresponding components:
x-component = 5.4142 mi/h
y-component = 1.4142 mi/h
Calculating for the resultant,
R = sqrt ((x²) + (y²))
R = sqrt ((5.4142 mi/h)² + (1.4142 mi/h)²)
R = 5.60 mi/h
Answer: 5.6 mi/h
