All categories

3 years ago

6.1 net force and newton’s First law

Physics

1 answer:

Alecsey [184]3 years ago

8 0

Newtons I law:

It also knew that <em>"law of inertia". </em>which states that an object at rest remains at rest and an object in motion, it continues its motion until unless the object experiences the external force( net force).

This means the object is at rest always, until some other force acting on it to disturb, similarly if the object is in motion it continues its motion until some other force acting on it to take the object to rest position.

The net force means the vector sum of all the forces acted on an object.

Tendency of an object changes of its motion when acted up on by a net force is known as <em>inertia</em>. And the inertia is directly proportional to mass of the object

You might be interested in

Technology is the application of science to make products that are useful to people. True or False

alekssr [168]

False false false false

5 0

4 years ago

Read 2 more answers

You are presented with several wires made of the same conducting material. The radius and drift speed are given for each wire in

jekas [21]

$\begin{array}{ccc}&\text{Radius} & \text{Drift Speed}\\d) & 2 \; r &2.5 \; v\\a) & 3 \; r &1 \; v\\b) & 4 \; r &0.5 \; v\\c) & 1 \; r &5 \; v\\\end{array}$

<h3>Explanation</h3>

$I = v \cdot A \cdot n \cdot q$ ,

where

$I$ is the current;
$v$ is the drift speed;
$A$ is the cross-section area of the wire,
$n$ is the number of charge carrier per unit volume, and
$q$ is the charge on each charge carrier.

Area of a circular cross-section:

$A = \pi \cdot r^{2}$ ,

where

$r$ is the radius of the wire.

$n$ and $q$ are the same for all four samples, for they are made out of the same material.

As a result, $I$ of each wire is directly proportional to $v \cdot r^{2}$ where the value of $\pi \cdot n \cdot q$ is constant.

For each of the four wires:

$\begin{array}{ccc|c}\\& r & v &I \propto v\cdot r^{2}\\a) & 3 & 1 & 9\\b) & 4 & 0.5 & 8\\c) & 1 & 5 & 5\\d) & 2 & 2.5 & 10\\\end{array}$ .

How do the four wires rank by their current?

d > a > b > c.

3 0

4 years ago

Based on the law of conservation of energy, how can we reasonably improve a machine’s ability to do work?

Sholpan [36]

You will have to redefine the machine's boundaries.

6 0

4 years ago

Read 2 more answers

The truck’s motor is creating 500 N of thrust, but air resistance is placing 500 N in the opposite direction

LenKa [72]

500-500=0 it has to be it

7 0

3 years ago

Will mark brainliest only if you show all work!

Drupady [299]

A :-) For this question , we should apply
v = u + at
Given - u = 40 m/s
a = 2.5 m/s^2
t = 12 sec
Solution -
v = u + at
v = 40 + 2.5 x 12
v = 40 + 30
v = 70 m/s

.:. The new speed is 70 m/s.
( speed = velocity ).

6 0

3 years ago