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 resistance.]

Answers

Answer 1

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)

Answer 2

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

Related Questions

What is the wavelength of radiation with a frequency of 1.50x10^13 hz?

Answers

π = c/ f
π = 3×10^8 / 1.5×10^13
π = 3÷1.5 ×10^(8-13)
π = 2×10^-5 m

We have that for the Question "What is the wavelength of radiation with a frequency of 1.50x10^13 hz? " it can be said that the wavelength of radiation with a frequency of 1.50x10^13 hz

[tex]\lambda=2*10^{-5}m[/tex]

From the question we are told

What is the wavelength of radiation with a frequency of 1.50x10^13 hz?

Generally the equation for the wavelength is mathematically given as

[tex]\lambda=\frac{V}{f}\\\\\lambda=\frac{3*10^8}{1.50x10^{13} }\\\\\lambda=2*10^{-5}[/tex]

Therefore

the wavelength of radiation with a frequency of 1.50x10^13 hz

[tex]\lambda=2*10^{-5}m[/tex]

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A rock at rest has weight 138 n. what is the weight of the rock when it is accelerating downward at 3.5 m/s2?

Answers

Final answer:

The weight of the rock when it is accelerating downward at 3.5 m/s² can be calculated using the formula Weight = Mass * Acceleration due to gravity.

Explanation:

The weight of an object is equal to its mass multiplied by the acceleration due to gravity. In this case, the weight of the rock when it is at rest is 138 N. Since the rock is accelerating downward at 3.5 m/s², the weight can be calculated using the formula:

Weight = Mass × Acceleration due to gravity

Let's assume the mass of the rock is 'm'. The acceleration due to gravity is approximately 9.8 m/s² on Earth. So, when the rock is accelerating downward at 3.5 m/s², its weight can be calculated as:

Weight = m × 3.5 m/s²

_____________ is increasing the temperatures of Earth’s oceans and atmosphere, leading to more intense storms of all types, including hurricanes. Nutrient depletion Urbanization Desertification Global Warming

Answers

The correct answer for this question would be D) Global warming or the fourth option.

option d is the correct answer for this question.

ASAP PLEASE HELP , Ill give you what you want
A rightward-moving truck skids to a stop from a very high speed with its wheels locked. What are the forces applied?
Force due to gravity
normal force
magnetic force
air resistance
force of friction
tension
spring force
applied forces

Answers

force of friction is applied,

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