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

Author Question: What is the minimum energy needed to lift a 1.0-kg rocket to a height of 200 km and to give it a ... (Read 164 times)

ARLKQ

  • Hero Member
  • *****
  • Posts: 571
on: Jul 29, 2018
What is the minimum energy needed to lift a 1.0-kg rocket to a height of 200 km and to give it a speed of 8.0 km/s at that height? (Neglect air resistance and the small decrease in g over that distance.)
 
  A) 34 kJ B) 34 MJ C) 34 J D) 34 TJ E) 34 GJ

Question 2

A slanted roof rises at 35 above the horizontal, and the straight-line distance from the top of the roof to the bottom edge is 4.5 m. The roof is covered with ice, so it offers no friction to objects sliding on it.
 
  A piece of ice at the top suddenly breaks loose and begins to slide down from rest. (a) How long will it take for the ice to reach the bottom edge of the roof? (b) How fast will the ice be traveling just as it reaches the bottom edge?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

daiying98

  • Sr. Member
  • ****
  • Posts: 354
Reply #1 on: Jul 29, 2018
Answer to Question 1

B

Answer to Question 2

(a) 1.3 s (b) 7.1 m/s


ARLKQ

  • Member
  • Posts: 571
Reply 2 on: Jul 29, 2018
Great answer, keep it coming :)

tuate

  • Member
  • Posts: 332
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.

Did you know?

Inotropic therapy does not have a role in the treatment of most heart failure patients. These drugs can make patients feel and function better but usually do not lengthen the predicted length of their lives.

Did you know?

Medications that are definitely not safe to take when breastfeeding include radioactive drugs, antimetabolites, some cancer (chemotherapy) agents, bromocriptine, ergotamine, methotrexate, and cyclosporine.

Did you know?

The top five reasons that children stay home from school are as follows: colds, stomach flu (gastroenteritis), ear infection (otitis media), pink eye (conjunctivitis), and sore throat.

Did you know?

The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.

A shim (or half shim) may be needed to provide the proper clearance between the flywheel teeth of ... A shim (or half shim) may be needed to provide the proper clearance between the flywheel teeth of ...
Energy flow and chemical cycling Energy flow and chemical cycling
Draping for massage of leg in supine position. A. Lift the leg with one hand, and with the other ... Draping for massage of leg in supine position. A. Lift the leg with one hand, and with the other ...
To broaden and lift the quadriceps muscles, place the heels of the hands together directly on top of ... To broaden and lift the quadriceps muscles, place the heels of the hands together directly on top of ...
Energy Transfer Energy Transfer
Comparing uncontrolled and controlled energy release. Comparing uncontrolled and controlled energy release.
Video: Coaductile pathway, Timing of contraction signal & Conduction system and ECG

For a complete list of videos, visit our video library