This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A solid uniform disk is rolling without slipping along a horizontal surface with a speed of 4.5 m/s ... (Read 52 times)

newyorker26

  • Hero Member
  • *****
  • Posts: 536
on: Jul 29, 2018
A solid uniform disk is rolling without slipping along a horizontal surface with a speed of 4.5 m/s when it starts up a ramp that makes an angle of 25 with the horizontal.
 
  What is the speed of the disk after it has rolled 3.0 m up as measured along the surface of the ramp?
  A) 4.0 m/s
  B) 1.9 m/s
  C) 2.1 m/s
  D) 6.8 m/s
  E) 8.0 m/s

Question 2

Human reaction time is usually greater than 0.10 s. If your friend holds a ruler between your fingers and releases it without warning, how far can you expect the ruler to fall before you catch it, assuming negligible air resistance?
 
  A) at least 3.0 cm
  B) at least 4.9 cm
  C) at least 6.8 cm
  D) at least 9.8 cm


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

jointhecircus

  • Sr. Member
  • ****
  • Posts: 343
Reply #1 on: Jul 29, 2018
Answer to Question 1

B

Answer to Question 2

B


newyorker26

  • Member
  • Posts: 536
Reply 2 on: Jul 29, 2018
Great answer, keep it coming :)

mohan

  • Member
  • Posts: 362
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

There used to be a metric calendar, as well as metric clocks. The metric calendar, or "French Republican Calendar" divided the year into 12 months, but each month was divided into three 10-day weeks. Each day had 10 decimal hours. Each hour had 100 decimal minutes. Due to lack of popularity, the metric clocks and calendars were ended in 1795, three years after they had been first marketed.

Did you know?

The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.

Did you know?

More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.

Did you know?

After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.

Did you know?

Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.

The platypus is very difficult to spot even on the surface of a river. The platypus is very difficult to spot even on the surface of a river.
Layers are deposited parallel to Earth’s surface. Younger layers are deposited on top of older layer Layers are deposited parallel to Earth’s surface. Younger layers are deposited on top of older layer
Risk of death from motorcycle accidents (dashed lines) and passenger accidents (solid lines) per 100 Risk of death from motorcycle accidents (dashed lines) and passenger accidents (solid lines) per 100
Surface Maps Surface Maps
When a 2.75-kg fan, having blades 18.5 cm long, is turned off, its angular speed decreases ... When a 2.75-kg fan, having blades 18.5 cm long, is turned off, its angular speed decreases ...
An 82-kg painter stands on a long horizontal board 1.55 m from one end. This 27-kg board is ... An 82-kg painter stands on a long horizontal board 1.55 m from one end. This 27-kg board is ...
Video: Introduction to Heart Attacks

For a complete list of videos, visit our video library