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3 years ago

What force is represented by the vector? O friction gravity normal force push

Physics

2 answers:

svetlana [45]3 years ago

7 0

Gravity, because the ball is falling down and the cause of body's to be pulled to the ground is gravity

neonofarm [45]3 years ago

6 0

Answer: the answer is gravity

Explanation: gravity allows objects to fall down so thats why when you drop something it falls if their was no gravity we would not be on the ground. hope this helped

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What are substances called whose water solutions conduct electricity

elena55 [62]

Answer: electrolyte solutions

Explanation:

7 0

4 years ago

A lawn mower engine running for 20 m i n does 4, 5 6 0, 0 0 0 J of work. What is the power output of the engine?

VladimirAG [237]

Answer: $3800\ W$

Explanation:

Given

Lawn mover running for $t=20\ min$

and does $W=4560\times 10^3\ J$

We know Power is rate of work i.e.

$P=\frac{\text{Work}}{\text{time}}$

$P=\frac{4560\times 10^3}{20\times 60}$

$P=3800\ W$

Thus Power output is $3800\ W$

4 0

3 years ago

The weight of a body is 147N. what is its mass?

barxatty [35]

<u>To find the mass, with only the weight</u>:

⇒ must consider the relationship between the mass and weight

⇒ (<em>in other words</em>) we must find the equation that has both the

mass and weight

<u>Based on our physics knowledge, we know</u>:

$Weight=mass*gravitational_. acceleration$

Weight: 147N
Gravitational Acceleration: 9.8 m/s²

<u>Now let's plug in the values, and solve</u>:

$147N = mass*9.8_.m/s^2\\mass = 15_.kg$

<u>Answer: 15 kg</u>

Hope that helps!

<em>*as a note, if you use the gravitational acceleration as 10m/s², then the answer would be 14.7 kg</em>

5 0

2 years ago

A small earthquake starts a lamppost vibrating back and forth. The amplitude of the vibration of the top of the lamppost is 7.0

krok68 [10]

Answer:

(a) T=6.07s

(b) $x_{max|4.0s}=3.62cm$

Explanation:

For Part (a)

The initial amplitude is given as A=7.0 cm

Apply the equation $x_{max}(t)=Ae^{-t/T}$ with $x_{max}(7.6s)=2.0cm$ we have:

$x_{max}(t)=Ae^{-t/T}\\2.0cm=(7.0cm)e^{-7.6s/T}\\T=-\frac{7.6s}{ln(\frac{2.0cm}{7.0cm} )} \\T=6.07s$

For Part (b)

Apply $x_{max}(t)=Ae^{-t/T}$ with t=4.0s and T=6.07s we have

$x_{max}(t)=Ae^{-t/T}\\x_{max}(4.0s)=(7.0cm)e^{-4.0/6.07}\\x_{max|4.0s}=3.62cm$

8 0

4 years ago

The density of an object has the equation d = m/v. if an object has a mass of

Anit [1.1K]

Answer:

<h3>The answer is 1.92 g/cm³</h3>

Explanation:

The density of a substance can be found by using the formula

$density = \frac{mass}{volume} \\$

From the question we have

$density = \frac{2.5}{1.3} \\ = 1.923...$

We have the final answer as

Hope this helps you

7 0

3 years ago

What force is represented by the vector? O friction gravity normal force push​

What force is represented by the vector? O friction gravity normal force push