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

Author Question: A 1.2-kg mass is projected from ground level with a velocity of 30 m/s at some unknown angle above ... (Read 136 times)

faduma

  • Hero Member
  • *****
  • Posts: 528
on: Jul 28, 2018
A 1.2-kg mass is projected from ground level with a velocity of 30 m/s at some unknown angle above the horizontal. A short time after being projected, the mass barely clears a 16-m tall fence. Disregard air resistance and assume the ground is level. What is the kinetic energy of the mass as it clears the fence?
 a. 0.35 kJ
  b. 0.73 kJ
  c. 0.40 kJ
  d. 0.68 kJ
  e. 0.19 kJ

Question 2

A 0.80-kg object tied to the end of a 2.0-m string swings as a pendulum. At the lowest point of its swing, the object has a kinetic energy of 10 J. Determine the speed of the object at the instant when the string makes an angle of 50 with the vertical.
 a. 5.6 m/s
  b. 4.4 m/s
  c. 3.3 m/s
  d. 5.0 m/s
  e. 6.1 m/s


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

jharrington11

  • Sr. Member
  • ****
  • Posts: 365
Reply #1 on: Jul 28, 2018
Answer to Question 1

A

Answer to Question 2

C


faduma

  • Member
  • Posts: 528
Reply 2 on: Jul 28, 2018
Gracias!

chereeb

  • Member
  • Posts: 326
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).

Did you know?

The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.

Did you know?

Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.

Did you know?

Glaucoma is a leading cause of blindness. As of yet, there is no cure. Everyone is at risk, and there may be no warning signs. It is six to eight times more common in African Americans than in whites. The best and most effective way to detect glaucoma is to receive a dilated eye examination.

Did you know?

There are immediate benefits of chiropractic adjustments that are visible via magnetic resonance imaging (MRI). It shows that spinal manipulation therapy is effective in decreasing pain and increasing the gaps between the vertebrae, reducing pressure that leads to pain.

The level in the coolant recovery system raises and lowers with engine temperature. The level in the coolant recovery system raises and lowers with engine temperature.
Upper-Level Maps Upper-Level Maps
Mass Wasting Triggers Mass Wasting Triggers
Body Mass Index (IBM) Body Mass Index (IBM)
Mass spectrometry of a synthetic version of collagen peptide Mass spectrometry of a synthetic version of collagen peptide
Giant ground sloth Giant ground sloth
Video: Dietary Cholesterol & LDL

For a complete list of videos, visit our video library