/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Q7-3MCQ Two identical billiard balls tra... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 7: Q7-3MCQ (page 170)

Two identical billiard balls traveling at the same speed have a head-on collision and rebound. If the balls had twice the mass, but maintained the same size and speed, how would the rebound be different? (a) At a higher speed.

(b) At slower speed.

(c) No difference.

Short Answer

Expert verified

(c) No difference in the rebound speed.

Step by step solution

01

Effect of mass on momentum and kinetic energy

Both kinetic energy and momentum are directly proportional to mass. So, their values will double if you double the mass.

02

Determine the effect on the final motion after doubling the mass

In this problem, the collision taking place is head-on. So, you can apply the conservation of momentum principle.

Based on this principle, if the mass is doubled, then both initial and final momentum will get doubled as they are equal.

This way, the conservation of the momentum equation will remain unchanged after doubling the mass.

From this equation, you can find that the final velocity is unchanged. So, there is no change in the rebound speed.

Thus, option (c) is the correct answer.

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.

Over 30 million students worldwide already upgrade their learning with 91影视!

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

At a hydroelectric power plant, water is directed at high speed against turbine blades on an axle that turns an electric generator. For maximum power generation, should the turbine blades be designed so that the water is brought to a dead stop, or so that the water rebounds?

Determine the fraction of kinetic energy lost by a neutron\(\left( {{m_1} = 1.01\;{\rm{u}}} \right)\)when it collides head-on and elastically with a target particle at rest which is

(a)\({}_1^1{\rm{H}}\)\(\left( {{m_1} = 1.01\;{\rm{u}}} \right)\)

(b)\({}_1^2{\rm{H}}\)(heavy hydrogen,\(m = 2.01\;{\rm{u}}\));

(c)\({}_6^{12}{\rm{C}}\)(\(m = 12\;{\rm{u}}\))

(d)\({}_{82}^{208}{\rm{Pb}}\)(lead,\(m = 208\;{\rm{u}}\)).

A massless spring with spring constant k is placed between a block of mass m and a block of mass 3m. Initially the blocks are at rest on a frictionless surface and they are held together so that the spring between them is compressed by an amount D from its equilibrium length. The blocks are then released and the spring pushes them off in opposite directions. Find the speeds of the two blocks when they detach from the spring.

You have been hired as an expert witness in a court case involving an automobile accident. The accident involved car A of mass 1500 kg which crashed into stationary car B of mass 1100 kg. The driver of car A applied his brakes 15 m before he skidded and crashed into car B. After the collision, car A slid 18 m while car B slid 30 m. The coefficient of kinetic friction between the locked wheels and the road was measured to be 0.60. Show that the driver of car A was exceeding the 55-mi/h (90 km/h) speed limit before applying the brakes.

The masses of the Earth and Moon are \({\bf{5}}{\bf{.98 \times 1}}{{\bf{0}}^{{\bf{24}}}}\;{\bf{kg}}\) and \({\bf{7}}{\bf{.35 \times 1}}{{\bf{0}}^{{\bf{22}}}}\;{\bf{kg}}\), respectively, and their centers are separated by \({\bf{3}}{\bf{.84 \times 1}}{{\bf{0}}^{\bf{8}}}\;{\bf{m}}\).

(a) Where is the CM of the Earth鈥揗oon system located?

(b) What can you say about the motion of the Earth鈥揗oon system about the Sun, and of the Earth and Moon separately about the Sun?
See all solutions

Recommended explanations on Physics Textbooks

Dynamics

Read Explanation

Nuclear Physics

Read Explanation

Atoms and Radioactivity

Read Explanation

Fluids

Read Explanation

Famous Physicists

Read Explanation

Magnetism and Electromagnetic Induction

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.