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
jek_recluse [69]
4 years ago
13

A small 0.13 kg metal ball is tied to a very light (essentially massless) string that is 0.70 m long. The string is attached to

the ceiling so as to form a pendulum. The pendulum is set into motion by releasing it from rest at an angle of 50 ∘ with the vertical.
A) What is the speed of the ball when it reaches the bottom of the arc?
B)What is the centripetal acceleration of the ball at this point?
C)What is the tension in the string at this point?
Physics
1 answer:
beks73 [17]4 years ago
7 0

Answer:

Explanation:

Let l be th length of pendulum

loss of height

= mg ( l - l cos50)

= mg l ( 1-cos50)

1/2 mv² = mgl ( 1-cos50)

v = √[2gl( 1- cos50)]

= √( 2 x 9.8 x .7 x ( 1-cos50)

= 2.2 m / s

speed at the bottom = 2.2 m /s

b )

centripetal acceleration

= v² / r

= 2.2 x 2.2 / .7

= 6.9 m /s²

C )

If T be the tension

T - mg = mv² / r

T = mg + mv² / r

= .13 X 9.8 + .13 X 6.9

= 2.17 N

You might be interested in
IN WHAT SEQUENCE DOES MAGMA MOVE THROUGH A VOLCANO?
Natalka [10]
Well the volcanos come from the lower crust and moves up with changes the climate
6 0
4 years ago
A satellite is orbiting earth at a distance of 35.0 kilometers. The satellite has a mass of 500 kilograms. What is the force bet
Alika [10]

Answer:

F = 4856.32 N

Explanation:

Given,

A satellite is orbiting earth at a distance from Earth surface, h = 35000 m

The mass of the satellite, m = 500 Kg

The radius of the Earth, R = 6.371 x 10⁶ m

The mass of the Earth, M = 5.972 x 10²⁴ Kg

The gravitational constant, G = 6.67408 x 10 ⁻¹¹ m³ kg⁻¹ s⁻²

The force between the Earth and the satellite is given by the formula

                                    F = GMm/(R+h)²  N

Substituting the values in the above equation

        F = (6.67408 x 10 ⁻¹¹ X 5.972 x 10²⁴ X 500) / (6.371 x 10⁶ + 35000)²

                                        = 4856.32 N

Hence,  the force between the planet and the satellite is, F = 4856.32 N

5 0
3 years ago
Suppose a drinking straw is in a glass of water. Someone blows air across the top of the straw. The water level in the straw ___
enyata [817]
The answer is A. drops! Suppose a drinking straw is in a glass of water. Someone blows air across the top of the straw. The water level in the straw will be drops. 

Hope it helped!
7 0
4 years ago
Read 2 more answers
Suppose Person A runs off the edge of the cliff at 2 m/s and Person B runs off the edge at 1 m/s. Which will hit the ground fart
djverab [1.8K]

Answer:

<h2>Person A will hit a distance father</h2>

Explanation:

Based on the fact that the velocity of person A is more than that of person B, that is from the question, person A has a velocity of 2m/s and person B has a velocity of 1m/s, this clearly shows that person A has the tendency to hit a distance farther from the cliff than person B.

3 0
4 years ago
Two charged particles move in the same direction with respect to the same magnetic field. Particle 1 travels seven times faster
alexgriva [62]

Answer:

|q1|/|q2| = 1/7

Explanation:

Particle 1 experiences a force F1 due to the magnetic field, B:

F1 = |q1|*v1*B

Particle 2 experiences a force F2 due to the magnetic field, B:

F2 = |q2|*v2*B

We're given that:

v1 = 7v2

Also, the force experience by both particles are equal:

F1 = F2

=> |q1|*v1*B = |q2|*v2*B

|q1|/|q2| = v2/v1

=> |q1|/|q2| = v2/7v2

=> |q1|/|q2| = 1/7

7 0
4 years ago
Read 2 more answers
Other questions:
  • Why does Chelsea see sparks as she removes her clothes from the clothes dryer?
    11·2 answers
  • A 3.57 kg block is drawn at constant speed 4.06 m along a horizontal floor by a rope exerting a 7.68 N force at angle of 15deg.
    11·2 answers
  • Will give Brainliest!! Question attached.
    5·2 answers
  • The development of new technology requires the evaluation of the overall benefit to cost ratio of the new technology.
    5·2 answers
  • A cat jumps 1m forward, then crawls 0.2m backwards. What is the displacement of the cat?
    5·2 answers
  • A dock worker loading crates on a ship finds that a 27 kg crate, initially at rest on a horizontal surface, requires a 80 N hori
    9·1 answer
  • How many grams of coffee must evaporate from 350 g of coffee in a 100-g glass cup to cool the coffee from 95.0ºC to 45.0ºC? You
    13·1 answer
  • Please help thank you
    13·1 answer
  • PLEASE HELP ASAP! WILL GIVE BRAINLIEST TO CORRECT ANSWER! HELP!! HELP!!
    15·2 answers
  • What is the affect of density of air in the velocity of sound?? ​
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!