1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
irina1246 [14]
3 years ago
13

A 1.0 m string with a 5 g stopper on the end is whirled in a vertical circle. The speed of the stopper is 8 m/s at the top of th

e circle. (A) What is the speed of the stopper at the bottom of the circle? (HINT: Use energy conservation principles!) (10.2 m/s) (B) What is the tension in the string when the stopper is at the top of the circle? (0.27 N) (C) What is the tension in the string when the stopper is at the bottom of the circle?
Physics
1 answer:
Andrew [12]3 years ago
3 0

Answer:

Explanation:

A )

At the bottom of the circle , the potential energy of the stopper is converted into kinetic energy

1/2 m V² = mg x 2r + 1/2 mv²

m is mass of stopper , V is velocity at the bottom , r is radius of the circular path which is length of the string , v is velocity at the top

1/2  V² = g x 2r + 1/2 v²

 V² = g x 4r +  v²

 V² = 9.8 x 4 +  8²

V² = 103.2

V = 10.16 m/s

B )

If T be the tension at the top

Net downward force

= mg + T . This force provides centripetal force for the circular motion

mg +T = mv² / r

T =   mv²/r -mg

= m ( v²/r - g )

= .005 ( 8²/1 -g )

= .005 x 54.2

= .27 N .

C ) At the bottom

Net force = T  - mg , T is tension at the bottom , V is velocity at bottom

T-mg = mV²/r

T = m ( V²/r +g )

= .005 ( 10.16²/1 +9.8)

= .005 x 113

= .56 N .

You might be interested in
Balance following equation then classify the reaction as synthesis (s)decomposition (d) single replacement (SD)double replacemen
stiv31 [10]
2H₂ + O₂ ⇒ 2H₂O
Classify: S (=synthesis)
6 0
3 years ago
Answer the following question according to formal grammatical rules.
VARVARA [1.3K]

Answer:

c

Explanation:

just trying to follow basic grammar.

5 0
2 years ago
Effect of impurities and temperature to surface tension​
oksano4ka [1.4K]
In general, surface tension decreases when temperature increases because cohesive forces decrease with an increase of molecular thermal activity. The influence of the surrounding environment is due to the adhesive action of liquid molecules that they have at the interface.
8 0
3 years ago
In a nuclear power plant, nuclear energy is first changed to ? energy
MakcuM [25]
Thermal energy Thermal energy <span>Thermal energy</span>
4 0
3 years ago
A constant force of 20. newtons applied to a box causes it to move at a constant speed of 4.0 meters per second. How much work i
podryga [215]
The answer is 3) 480 joules
6 0
2 years ago
Other questions:
  • When a plant is entering the calvin cycle of photosythesis______.
    7·2 answers
  • What is the pH scale used for? a. Measures hydroxide ion concentration (strength of the acid or base) b. Measures hydronium ion
    11·1 answer
  • If you could find the coldest object on Earth, you would find that it _________.
    14·2 answers
  • You're riding a unicorn at 25 m/s and come to a uniform stop at a red light 20m away. What's your acceleration?
    5·2 answers
  • What type of spectrum, if any, would be produced if the light radiated by a heated atomic gas were to be dispersed through a pri
    15·1 answer
  • Speedy Sue, driving at 34.0 m/s, enters a one-lane tunnel. She then observes a slow-moving van 160 m ahead traveling at 5.40 m/s
    6·2 answers
  • Why does it rain so hard?
    13·1 answer
  • A physicist measures the magnetic field at the center of a loop of wire with N number of turns (not a solenoid) and current I fl
    7·1 answer
  • Funtions of a fuse box​
    15·1 answer
  • I dont understand physics.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!