# Practice problems | Biology homework help

Solve the following problems. Show your work with your answers.

EQUATIONS:

v = d/t        a = v/t           Δv = vf – vi             p = m*v         F = m*a            g = 9.8 m/s2        Weight=m*g

CALCULATE THE FOLLOWING – SHOW YOUR WORK!!

1. A motorcycle went from 0 m/s to 35 m/s in 5.1 s. What is the motorcycle’s acceleration?
2. A race car was clock going 52 m/s. At another point, 5 s later, it was clocked going 155 m/s. What was the car’s acceleration?
3. Calculate the speed of a bee flying 160 m in 23 s.
4. Calculate the velocity of a car moving 300 m in 20 s going east towards the mall.
5. Calculate the weight of a 6 kg pizza.
6. A dog runs with a speed of 1.5 m/s on ice. It slides to a stop with an acceleration of -0.50 m/s2. How long does it take for the dog to stop?
7. A ball is hit so that it accelerates at 10 m/s2. The ball hits a glove with a force of 5 N. What is the mass of the ball?
8. A 1.5 x 105 kg train is accelerating. The force applied to the train is 7.0 x 104 N. What is the train’s acceleration?
9. Calculate the momentum of an 8 kg box which slides at 5 m/s.
10. Find the mass of a child who runs at a speed of 4 m/s to get a pizza with extra cheese. His momentum is 120 kgm/s.

some material

Free Fall

Free fall is when gravity is the only force on an object. In the real world falling objects also have air resistance (a type of friction) on them, but this force is so small that it can often be ignored.

g = acceleration due to gravity on Earth = 9.8 m/s2

This value can be used in place of a in our force and acceleration equations. If there was no such thing as air resistance, all falling objects would strike the ground at the exact same time. Even a feather and hammer as astronauts tested on the moon in the video below.

Weight Vs. Mass

In our everyday language these words are often used to mean the same thing, however their real meanings are different. Mass is a measure of the amount of matter in an object and never changes. The SI unit for mass is kg. Weight is the force on a object due to gravity. The SI unit for weight is newtons because it is a force. Weight can be calculated using the following equation:

Weight = m * g

This is just a variation of Newton’s second law using a specific force and a specific acceleration. Weight changes depending on the gravitational force. This is different on each planet due to their differences in mass.

 Click HERE to discover what your weight would be on different planets. Where would you be the heaviest? The lightest?

Apparent Weightlessness

Since there is no where on Earth where we can escape Earth’s gravitational pull, we know that even when we feel weightless, like on a big drop on a roller coaster, we do still have weight. Apparent weightlessness occurs when your body is falling downwards at 9.8 m/s2.

 Click HERE to read some information and do some activities to explain the differences between free fall and apparent weightlessness.
Calculate your paper price
Pages (550 words)
Approximate price: -

Why Work with Us

Top Quality and Well-Researched Papers

We always make sure that writers follow all your instructions precisely. You can choose your academic level: high school, college/university or professional, and we will assign a writer who has a respective degree.

Professional and Experienced Academic Writers

We have a team of professional writers with experience in academic and business writing. Many are native speakers and able to perform any task for which you need help.

Free Unlimited Revisions

If you think we missed something, send your order for a free revision. You have 10 days to submit the order for review after you have received the final document. You can do this yourself after logging into your personal account or by contacting our support.

Prompt Delivery and 100% Money-Back-Guarantee

All papers are always delivered on time. In case we need more time to master your paper, we may contact you regarding the deadline extension. In case you cannot provide us with more time, a 100% refund is guaranteed.

Original & Confidential

We use several writing tools checks to ensure that all documents you receive are free from plagiarism. Our editors carefully review all quotations in the text. We also promise maximum confidentiality in all of our services.

Our support agents are available 24 hours a day 7 days a week and committed to providing you with the best customer experience. Get in touch whenever you need any assistance.

Try it now!

## Calculate the price of your order

Total price:
\$0.00

How it works?

Follow these simple steps to get your paper done

Fill in the order form and provide all details of your assignment.

Proceed with the payment

Choose the payment system that suits you most.

Receive the final file

Once your paper is ready, we will email it to you.

Our Services

No need to work on your paper at night. Sleep tight, we will cover your back. We offer all kinds of writing services.

## Essay Writing Service

No matter what kind of academic paper you need and how urgent you need it, you are welcome to choose your academic level and the type of your paper at an affordable price. We take care of all your paper needs and give a 24/7 customer care support system.