All categories

2 years ago

Answer the following regarding Momentum Change and Force

Mathematics

1 answer:

trapecia [35]2 years ago

6 0

1. The force necessary to gain a velocity of 60 m/s within 5 mins is 40 N

2. The velocity gained by the object at the end of the second minute is 30 m/s

<h3>1. How to determine the force</h3>

Initial velocity (u) = 0 m/s
Final velocity (v) = 60 m/s
Mass (m) = 200 Kg
Time (t) = 5 ms = 5 mins = 5 × 60 = 300 s
Force (F) =?

F = m(v –u) / t

F = 200(60 – 0) / 300

F = 40 N

<h3>2. How to determine the velocity </h3>

Force (F) = 150 N
Mass (m) = 600 Kg
Initial velocity (u) = 0 m/s
Time (t) = 5 ms = 2 mins = 2 × 60 = 120 s
Final velocity (v) = ?

F = m(v –u) / t

Cross multiply

m(v –u) = Ft

Divide both sides by m

v - u = Ft / m

v - 0 = (150 × 120) / 600

v = 30 m/s

Learn more about momentum:

brainly.com/question/250648

#SPJ1

You might be interested in

Does a parallelogram have to have equal sides

Rudik [331]

Answer:

The two shorter sides have to be equal and the two longer sides have to be equal.

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

A researcher wants to estimate the percentage of all adults that have used the Internet to seek pre-purchase information in the

Lubov Fominskaja [6]

Answer:

The required sample size for the new study is 801.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

The margin of error is:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

25% of all adults had used the Internet for such a purpose

This means that $\pi = 0.25$

95% confidence level

So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

What is the required sample size for the new study?

This is n for which M = 0.03. So

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.03 = 1.96\sqrt{\frac{0.25*0.75)}{n}}$

$0.03\sqrt{n} = 1.96\sqrt{0.25*0.75}$

$\sqrt{n} = \frac{1.96\sqrt{0.25*0.75}}{0.03}$

$(\sqrt{n})^2 = (\frac{1.96\sqrt{0.25*0.75}}{0.03})^2$

$n = 800.3$

Rounding up:

The required sample size for the new study is 801.

4 0

3 years ago

Write an equation to represent the following statement.

hichkok12 [17]

Answer:

j / 9 = 5

j = 45

Step-by-step explanation:

j / 9 = 5

Multiply each side by 9

j/9 * 9 = 5*9

j = 45

5 0

3 years ago

During scuba lessons, Sue dove 30 feet, Harriet dove 120 feet, and Kathy dove 90 feet.What integers represent these depths? Orde

aleksley [76]

120, 90, 30 if you're going from the depths of the water to water level

3 0

3 years ago

A taxi company charges passengers $2.00 for a

Kipish [7]

Answer:

The graph of the function rule will be a line segment connecting (0,2) and (40,22) as shown in the graph below.

Step-by-step explanation:

Given:

The function rule representing the total cost of ride and number of miles traveled is:

$C=0.5m+2$

Now, the maximum value of $m$ is 40.

So, the maximum cost of ride is given as:

$C_{max}=0.5(40)+2=20+2=22$

So, the graph of the given function rule has a domain between 0 and 40 and range is between 2 and 22.

The graph is shown below.

7 0

3 years ago