Log out Go to App
Go to App

Learning Materials

Features

Discover

Chapter 9: Q. 1 (page 227)

Which has the larger kinetic energy, a 10 g bullet fired at
500 m/s or a 75 kg student running at 5.5 m/s?

Short Answer

Expert verified

Bullet has larger kinetic energy compared to student.

Step by step solution

01

Given information

Mass of bullet = 10 g bullet and velocity 500 m/s

Mass of student = 75 kg and velocity= 5.5 m/s?

02

2Step2: Explanation

Calculate the kinetic energy using

KE = 1/2(mv2)

Now find the kinetic energy of bullet and students using the equation (1)

KEBullet =1/2(0.010kg)(500m/s)2 = 1250 J

Similarly

KEstudent= 1/2(75kg)(5.5m/s)2 = 1134.38 J

We can see KEbullet> KEstudent

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

A 2.0 kg book is lying on a 0.75-m-high table. You pick it up and place it on a bookshelf 2.25 m above the floor.
a. How much work does gravity do on the book?
b. How much work does your hand do on the book?

A mother has four times the mass of her young son. Both are running with the same kinetic energy. What is the ratio vson /vmother of their speeds?

A uniform solid bar with mass m and length L rotates with angular velocity v about an axle at one end of the bar. What is the bar’s kinetic energy?

At what speed does a 1000 kg compact car have the same kinetic energy as a 20,000 kg truck going 25 km/h?

A 90kg firefighter needs to climb the stairs of a 20m-tall building while carrying a 40kg backpack filled with gear. How much power does he need to reach the top in 55s?
See all solutions

Recommended explanations on Physics Textbooks

Conservation of Energy and Momentum

Read Explanation

Electric Charge Field and Potential

Read Explanation

Linear Momentum

Read Explanation

Famous Physicists

Read Explanation

Mechanics and Materials

Read Explanation

Rotational Dynamics

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free