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
andreev551 [17]
3 years ago
15

A 1.0-kilogram ball is dropped from the roof of a building 40. meters tall. What is the approximate time of fall? [Neglect air r

esistance.]
Physics
2 answers:
Elza [17]3 years ago
6 0
<span>2.856s Distance traveled under constant acceleration as a function of time is given by x=(gt^2)/2 where g is the acceleration and t is time. In this case acceleration is due to gravity and is 9.81m/s^2. The distance of interest is x=40m. Substituting and solving 40=(9.81*t^2 )/ 2 80 = 9.81*t^2 8.1549 = t^2 2.856s = t</span>
Effectus [21]3 years ago
3 0
H = 40 m, the height from which the ball is dropped.
m = 1 kg, the mass of the ball

Assume g = 9.8 m/s² and neglect air resistance.

The initial vertical velocity is zero.
If t = the time of flight, then
40 m = (1/2)*g*(t s)² = 0.5*9.8*t²
t² = 40/4.9 = 8.1633
t = 2.857 s

Answer:  2.9 s (nearest tenth)
You might be interested in
Match the words in the left column to the appropriate blanks in the sentences on the right. Make certain each sentence is comple
lisov135 [29]

Answer:

Answer to the above question is given as follows:

(1) Forward

(2) Increases

(3) Small, No Whiplash

Explanation:

3 0
3 years ago
Read 2 more answers
The coil of an ac generator has 50 loops and a cross-sectional area of LaTeX: 0.2~m^20.2 m 2 . What is the maximum emf that can
lisov135 [29]

Answer:

Maximum emf in the coil is 100 volt    

Explanation:

We have given number of loops in the coil N = 50

Cross sectional area A=0.2m^2

Angular speed is given \omega =5rad/sec

Magnetic field is given B=0.2T

We have to find the maximum emf in the coil

Maximum emf in the coil is given by e=NBA\omega

e=50\times 2\times 0.2\times 5=100volt

So maximum emf induced in the coil is 100 volt

7 0
3 years ago
Sweating and panting are examples of which characteristics of life?
Marianna [84]
C.reproducing is think and if wrong I'm so very sorry
7 0
3 years ago
Read 2 more answers
How to calculate time using power and energy
Troyanec [42]

Answer:

The formula that links energy and power is: Energy = Power x Time. The unit of energy is the joule, the unit of power is the watt, and the unit of time is the second.

Explanation:

7 0
3 years ago
What do echolocation and ultrasounds have in common?
Natali5045456 [20]
They both are mechanical waves.

Explanation:

Echolocation and ultrasounds are both mechanical waves that require a medium to trace through. They both process and transfer information through waves; the difference is that we humans cannot hear ultrasound waves.
8 0
2 years ago
Other questions:
  • Iron(II) carbonate (FeCO3) has a solubility product constant of 3.13 x 10-11 . Calculate the molar solubility of FeCO3 in water
    11·1 answer
  • A circuit is made of 0.4 ohm wire, 150 ohm bulb and a 120ohm rheo stat connected inseries. Determine the total resistance of the
    14·1 answer
  • Why degree F is best to measure accurate temperature<br>​
    10·1 answer
  • n object moves with a constant speed of 30 m/s on a circular track of radius 150 m. What is the acceleration of the object
    14·1 answer
  • Figure 3 shows a stationary metal block hanging from the middle of a stretched wire which is suspended from a horizontal beam. T
    13·1 answer
  • Define 1 kilowatthour​
    10·2 answers
  • The environment between the outer and inner nuclear membranes is most accurately referred to as the:
    11·1 answer
  • A golf ball (m=26.7g) is struck a blow that makes an angle of 33.6 degrees with the horizontal. The drive lands 190m away on a f
    12·1 answer
  • Complete the following math operations giving the answer with the correct significant digits.
    9·1 answer
  • A sample of an ideal gas is heated, and its kelvin temperature doubles. What happens to the average speed of the molecules in th
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!