Author Question: You are in distant space. A giant boulder, many times larger than you, is at rest in front of you. ... (Read 32 times)

c0205847

  • Hero Member
  • *****
  • Posts: 531
You are in distant space. A giant boulder, many times larger than you, is at rest in front of you. You tap the boulder lightly with a small hammer. What does the boulder do?
 
  A) It accelerates during the tap, up to a slow speed slower than walking speed, then keeps moving at that speed.
  B) It accelerates both during and after the tap.
  C) It accelerates during the tap, up to a high speed faster than a fast-moving car, then keeps moving at that speed.
  D) It remains at rest.
  E) It speeds up a little during the tap, but after the tap it soon within a few minutes slows down and comes to rest.

Question 2

A race car circles 10 times around a circular 8.0-km track in 20 min. Using SI units
  (a) what is its average speed for the ten laps?
  (b) what is its average velocity for the ten laps?
 
  What will be an ideal response?



k2629

  • Sr. Member
  • ****
  • Posts: 357
Answer to Question 1

A

Answer to Question 2

(a) 67 m/s (b) 0 m/s



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question


 

Did you know?

Approximately 500,000 babies are born each year in the United States to teenage mothers.

Did you know?

The term pharmacology is derived from the Greek words pharmakon("claim, medicine, poison, or remedy") and logos ("study").

Did you know?

Colchicine is a highly poisonous alkaloid originally extracted from a type of saffron plant that is used mainly to treat gout.

Did you know?

Every flu season is different, and even healthy people can get extremely sick from the flu, as well as spread it to others. The flu season can begin as early as October and last as late as May. Every person over six months of age should get an annual flu vaccine. The vaccine cannot cause you to get influenza, but in some seasons, may not be completely able to prevent you from acquiring influenza due to changes in causative viruses. The viruses in the flu shot are killed—there is no way they can give you the flu. Minor side effects include soreness, redness, or swelling where the shot was given. It is possible to develop a slight fever, and body aches, but these are simply signs that the body is responding to the vaccine and making itself ready to fight off the influenza virus should you come in contact with it.

Did you know?

In inpatient settings, adverse drug events account for an estimated one in three of all hospital adverse events. They affect approximately 2 million hospital stays every year, and prolong hospital stays by between one and five days.

For a complete list of videos, visit our video library