All categories

3 years ago

Which does a reference point provide? Check all that apply.

2 answers:

6 0

A reference point is a point in geometry or general which is used to determine or refer to another point. In reference to this point, measurements can be done. Like, a reference point in space is used to measure distance or displacement to another point. A reference point in time is used to measure the time interval of an event. A reference in space-time can be used to measure the speed or detect object's motion. Hence, the following points apply:

→A position from which to measure future distance

→a set of standard units for measuring displacement

→a method for determining the speed of an object

→a way to detect an object’s motion

A reference point provides a way/method to infer information about the object.

svetlana [45]3 years ago

6 0

Answer:

a position from which to measure future distance

Explanation:

Reference point is a standard point taken as a fixed point for future measurement. Example, consider a ball is at height h. Here height h is measured from the surface of earth. So, the surface of earth is taken as a reference point for future measurement. In all measurements from that time is taken from the surface of the earth.

You might be interested in

What happens to an object as its kinetic energy increases?

Reptile [31]

Its moves more, If an object moves it has a kinetic enegy

3 0

3 years ago

Does frequency affect wavelength?

Vinil7 [7]

Answer:

yeah

Explanation:

as wavelength increases frequency decreases and it goes the same for the opposite way

6 0

3 years ago

With "normal" gravity, we used a potential energy of mgh. Now with the gravity that is more accurate over longer distances we us

Artemon [7]

Answer:

A general solution is $\Delta U=mh\frac{GM}{r^{2}}\frac{r}{r+\Delta h}$ and a particualr case is mgh, it is just to distance around the radius Earth.

Explanation:

We can use a general equation of the potential energy to understand the particular and general case:

The potential energy is defined as $U=-\int F\cdot dx$ , we know that the gravitational force is $F=GmM/r^{2}$ , so we could find the potential energy taking the integral of F.

$U=-GmM/r$ (1)

We can find the particular case, just finding the gravitational potential energy difference:

$\Delta U=U_{f}-U_{i}$ . Here Uf is the potential evaluated in r+Δh and Ui is the potential evaluated in r.

Using (1) we can calculate ΔU.

$\Delta U=-\frac{GmM}{r+\Delta h}+\frac{GmM}{r}$

Simplifying and combining terms we have a simplified expression.

$\Delta U=mh\frac{GM}{r^{2}}\frac{r}{r+\Delta h}$ (2)

Let's call $g=\frac{GM}{r^{2}}$ . It is the acceleration due to gravity on the Earth's surface, if r is the radius of Earth and M is the mass of the Earth and we can write (2) as ΔU=mgh, but if we have distance grader than r we should use (2), otherwise, we could get incorrect values of potential energy.

I hope i hleps you!

3 0

4 years ago

If acceleration is zero what statement about velocity is true *

Wittaler [7]

Answer:

Option"B" is correct.

Explanation:

when a body move with constant velocity then acceleration is zero.

6 0

3 years ago

Read 2 more answers

Which statements about braking a car are true? A)The greater the kinetic energy of a car, the longer it takes for the car to sto

NikAS [45]

Answer:

option c

Explanation:

Kinetic energy is due to the speed of a body.

$K.E = \frac{1}{2}mv^2$

When speed is doubled, the kinetic energy is quadruple.

From third equation of motion, braking distance is also proportional to square of speed. Thus, when speed is doubled, the braking distance is quadruple.

Thus, option c is correct.

3 0

3 years ago

Read 2 more answers