Answer:
F'=708.53 N
Explanation:
We have,
The lifting force, F, exerted on an airplane wing varies jointly as the area, A, of the wing's surface and the square of the plane's velocity, v. It means tat,
k is constant
If, A = 190 Ft², v = 220 mph, F = 950 pounds
Let's find k first from above data. So,
It is required to find the lifting force on the wing if the plane slows down to 190 miles per hour. Let F' is the new force. So,
So, the lifting force is 708.53 pounds if the plane slows down to 190 miles per hour.
Answer:
D. The more the change in gravitational potential energy.
Explanation:
From Physics, we know that change in gravitational potential energy (
), measured in joules, is directly proportional to change in height (
), measured in meters. Then, the higher her jump, the more the change in gravitational potential energy.
We cannot speak of elastic energy, since statement of the problem does not speak of any deformable system (i.e. spring) in any form.
Therefore, the correct answer is D.
Explanation:
(a) Mass of the cars, m₁ = m₂ = 1160 kg
Distance between cars, d = 35 m
The gravitational force between two cars is given by :
So, the force of gravity between the cars is 
.
(b)The weight of a car is given by :
W = 11368 N
On comparing,
So, the weight of the car is 
times the force of gravitation between the cars.
It is a physical change because you are not changing it chemicaly
