Login Registrieren

Warning: foreach() argument must be of type array|object, bool given in /var/www/html/web/app/themes/studypress-core-theme/template-parts/header/mobile-offcanvas.php on line 20

Chapter 5: Q9 CQ (page 137)

A rubber ball is dropped onto the floor. What force causes the ball to bounce?

Short Answer

Expert verified

When the ball hits the ground, the normal (perpendicular) ground reaction force acts upward, causing the ball to bounce back.

Step by step solution

01

A concept:

When you drop the ball, gravity pulls it to the floor. The ball gains energy of motion, known as kinetic energy. When the ball hits the floor and stops, that energy has to go somewhere. The energy passes into the deformation of the sphere - from the original round shape to a squished shape.

02

The force causes the ball to bounce:

The nature of these forces is electromagnetic. The molecules of the earth are held tightly together by repelling the ball when it hits them.

The ball would pass through the ground if the intermolecular forces were not so strong.

Note that the rubber ball bounces more than the steel ball. This is due to the elasticity of the ball, which is again related to the molecular forces in rubber and steel, which are reasonably different.

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

Question: Objects with masses $m_{1} = 10.0 kg$ and $m_{2} = 5.0 kg$ are connected by a light string that passes over a frictionless pulley as in Figure P5.40. If, when the system starts from rest, $m_{2}$ falls 1.00 m in 1.20 s, determine the coefficient of kinetic friction between $m_{1}$ and the table.

Question: A crate of weight $F_{g}$ is pushed by a force $\vec{P}$ on a horizontal floor as shown in Figure P5.89. The coefficient of static friction is $μ$ , and $\vec{P}$ is directed at angle $θ$ below the horizontal. (a) Show that the minimum value of $P$ that will move the crate is given by

$P = \frac{μ_{g} F_{g} s e c θ}{1 - μ_{g} t a n θ}$

(b) Find the condition on $θ$ in terms of $μ_{s}$ for which motion of the crate is impossible for any value of $P$ .

The third graders are on one side of a schoolyard, and the fourth graders are on the other. They are throwing snowballs at each other. As a result, snowballs of various masses are moving with different velocities, as shown in Figure OQ5.3. Rank the snowballs (a) through (e) according to the magnitude of the total force exerted on each one. Ignore air resistance. If two snowballs rank together, make that fact clear.

Question:If a man weighs 900 N on the Earth, what would he weigh on Jupiter, where the free-fall acceleration is 25.9 m/s²?

Twenty people participate in a tug-of-war. The two teams of ten people are so evenly matched that neither team wins. After the game, they notice that a car is stuck in the mud. They attach the tug-of-war rope to the bumper of the car, and all the people pull on the rope. The heavy car has just moved a couple of decimeters when the rope breaks. Why it did not break when the same twenty people pulled on it in a tug-of-war?

See all solutions

Recommended explanations on Physics Textbooks

Measurements

Read Explanation

Oscillations

Read Explanation

Wave Optics

Read Explanation

Work Energy and Power

Read Explanation

Famous Physicists

Read Explanation

Electricity

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