How is a frame of reference used to describe motion

1 answer:

5 0

In particle kinematics, we measure the acceleration of the particle. For this, an observer is taken as a reference point. Generally we consider the observer as in origin of a co-ordinate system. The place where observer is placed is known as frame of reference.
Newton's laws only work in the inertial frame of reference. Inertial frame is a frame of reference whose acceleration is zero. But, if you are observing the motion of an object from non-inertial frame, you need to add and extra force on the system under observation which is known as pseudo force.

You might be interested in

Your window thermometer shows that the temperature outdoors is 89.3°f. how should you report this temperature to your friend in

SVETLANKA909090 [29]

A) Conversion from Fahrenheit to Celsius:
The relationship between the two scales is the following
$T_f = \frac{9}{5}T_c + 32$
where
$T_f$ is the temperature in Fahrenheit
$T_c$ is the temperature in Celsius

Re-arranging the formula, we find the inverse relationship:
$T_c= \frac{5}{9}(T_f-32)$
and we can use this equation to convert $T_f = 89.3^{\circ}F$ into Celsius:
$T_c = \frac{5}{9}(89.3-32)=31.7^{\circ} C$

(b) Conversion to Kelvin scale:
The conversion between Celsius scale and Kelvin scale is easier:
$T_k = T_c + 273.1$
where $T_k$ is the temperature in Kelvin. Using $T_c = 31.7^{\circ} C$ , we find
$T_k = 31.7 + 273.1 = 304.8 K$

5 0

3 years ago

In the example given below, Aaron applies a force of 300N and Bob applies a force of 450N :

garri49 [273]

Answer:

Explanation:

This problem is all about torque. The "rules" are that in order for a system to be in rotational equilibrium, the sum of the torques on the system have to equal 0 (in other words, they have to equal each other {cancel each other out}). The equation for torque is

τ = F⊥r where τ is torque, F⊥ is the perpendicular force, and r is the lever arm length in meters. We also have to understand that in general Forces moving clockwise are negative and Forces moving counterclockwise are positive. Now we're ready for the problem:

A. The counterclockwise torque:

τ = 300(3) so

τ = 900N*m

B. The clockwise torque:

τ = -450(2.5) so

τ = -1100N*m

C. Obviously the system is not in roational equilibrium because one side is experiencing a greater torque than the other. This system will move clockwise as it currently exists.

D. In order for the system to be in rotational equilibrium, we have to move Bob's location from the fulcrum. Let's see to where.

The torques have to be the same on both sides of the fulcrum; mathematically, that looks like this:

F⊥r = F⊥r Filling in:

300(3) = 450r and

900 = 450r so

2 = r. This means that Bob will have to move closer to the fulcrum by a half of a meter to 2 meters from the fulcrum in order for the system to be in balance.

Isn't this so much fun?!

3 0

3 years ago

The process of physically separating a single-phase mixture into components if the components have different boiling points is c

kobusy [5.1K]

This process of physically separating a single phase mixture into several components would be termed simple distillation, I believe.

As it is mentioned that one is separating them based on their different boiling points.

6 0

4 years ago

A car travels from point A to point B, moving in the same direction but with a non-constant speed. The first half of the distanc

Dmitrij [34]

Answer:

Explanation:

From A to B

distance traveled with velocity $v_1$ in time $t_1$