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
vekshin1
3 years ago
10

A balloon starts rising from rest from the ground with an acceleration of 1.25 m/s2. After 8s, a stone is released from the ball

oon. The stone will. (a)cover a distance of 40m (b)have a displacement of 50 m (c)each the ground in 4s (d)begin to move down after being released
Physics
1 answer:
lys-0071 [83]3 years ago
4 0
After 8 s, both the balloon and the stone have upward velocity of
v = (1.25 m/s^2)*(8 s) = 10 m/s
Both the balloon and the stone would have traveled upward by a height of
h = (1/2)*(1.25 m/s^2)*(8 s)^2 = 40 m

When the stone is dropped, it will
(a) have an initial upward speed of  10 m/s,
(b) it will be 40 m above ground,
(c) the time for it to reach the ground is given by
    (10 m/s)t - (1/2)*(9.81 m/s^2)t^2 = -40
    4.9t^2 - 10t - 40 =0
    Use the quadratic formula to obtain t = 4.054 s
(d) it will travel a distance upward, s, given by
    0 = 10^2 - 2(9.8)s => s = 5.1 m
    The stone will attain a height of 45.1 m aboe ground.

Answer:
c. The stone will reach the ground in 4 s.
You might be interested in
The primary source of evidence proposed by many scientist to support the theory of an ancient earth is ____ dating.
vova2212 [387]
It depends on your definition of “ancient.” Radiometric dating using Carbon-14 can reliably date back to about 50,000 years, uranium-lead or lead-lead dating can date back multiple millions, potassium-argon dating can reach 1.5 billion, and rubidium-strontium can reach 50 billion (nearly 4x the age of the universe). It depends on the context in which this question is being asked.
7 0
3 years ago
What is the type of intermolecular force in methylated spirits
Olin [163]
. Methylated spirits have ethanol as a base but may include methyl alcohol (methanol) as part of the denaturing process.
7 0
3 years ago
ANSWER QUCIK<br> PLS THANK YOU
Reil [10]
Electrical energy in the charger and cable

Chemical energy in the battery of the mobile phone
8 0
3 years ago
How much energy in Joules (J) would an electric heater that draws 9.5 A when connected to a 120 V supply use if the heater were
leonid [27]
<h2>Energy used by heater is 8.21 x 10⁶ J</h2>

Explanation:

Energy = Power x Time

Power = Voltage x Current

Voltage = 120 V

Current = 9.5 A

Power = Voltage x Current

Power = 120 x 9.5 = 1140 W

Time = 2 hours = 2 x 60 x 60 = 7200 s

Energy = Power x Time

Energy = 1140 x 7200

Energy = 8208000 J

Energy used by heater is 8.21 x 10⁶ J

7 0
3 years ago
Definition of distance in physics
solniwko [45]

Answer:

Distance is a scalar quantity that refers to "how much ground an object has covered" during its motion. Displacement is a vector quantity that refers to "how far out of place an object is"; it is the object's overall change in position.

Explanation:

8 0
2 years ago
Other questions:
  • My parrot has a mass of 1.33kg, what is it's weight here on earth​
    6·1 answer
  • A light-year is the distance that light travels in one year. The speed of light is 3.00 × 108 m/s. How many miles are there in o
    12·1 answer
  • PLEASE HELP........Compare and contrast microwaves with visible light using wavelength frequency and energy.
    7·2 answers
  • ! . Which are the expected types and total numbers of atoms in the reactants of this chemical reaction?? 8SO2
    15·2 answers
  • Name 15 measurement instrument use in physic and their uses
    11·1 answer
  • What force is required to accelerate a body with a mass of 15 kilograms at a rate of 8 m/s²?
    7·1 answer
  • Question 1
    7·1 answer
  • What is the best description of the destructive interference of light?
    5·1 answer
  • What happens to the wavelength of a wave if the frequency quadruples, but the wave is in the same medium?
    7·1 answer
  • Who made the first game
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!