Well, first of all, the car is not moving at a uniform velocity, because,
on a curved path, its direction is constantly changing. Its speed may
be constant, but its velocity isn't.
The centripetal force on a mass 'm' that keeps it on a circle with radius 'r' is
F = (mass) · (speed)² / (radius).
For this particular car, the force is
(2,000 kg) · (25 m/s)² / (80 m)
= (2,000 kg) · (625 m²/s²) / (80 m)
= (2,000 · 625 / 80) (kg · m / s²)
= 15,625 newtons .
The weight of the box with the given mass on Earth is 1470 Newtons.
Given the data in the question;
- Mass of box;

- Weight of box;

<h3>Weight</h3>
Weight is the force acting on the mass of a particular object or particle due to gravity. It is the gravitational force acting on an object with mass. It is measured in newtons. It is expressed as;

Where m is mass of object and g is acceleration due to gravity on earth (
)
To find the weight of the box, we substitute our values into the expression above;

Therefore, the weight of the box with the given mass on Earth is 1470 Newtons.
Learn more about weight: brainly.com/question/19540959
Answer:
100
Explanation:
= Resistivity of axon
r = Radius of axon
t = Thickness of the membrane
= Resistivity of the axoplasm
Speed of pulse is given by

So, radius is given by

If radius is increased by a factor of 10 new radius will be

So, The radius will increase by a factor of 100.
Answer:
B
Explanation:
Gravity is an invisible force, and so is magnetism and electricity. Friction involves the rubbing of things together to create energy.