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
likoan [24]
3 years ago
13

a student drops an object from the top of a building which is 19.6 m high. How long does it take the object to fall to the groun

d?
Physics
2 answers:
zubka84 [21]3 years ago
8 0

Here's a formula that's simple and useful, and if you're really in
high school physics, I'd be surprised if you haven't see it before. 
This one is so simple and useful that I'd suggest memorizing it,
so it's always in your toolbox.

This formula tells how far an object travels in how much time,
when it's accelerating:

               Distance = (1/2 acceleration) x (Time²).

                           D = 1/2 A T²

For your student who dropped an object out of the window,

     Distance = 19.6 m
     Acceleration = gravity = 9.8 m/s²

                                              D = 1/2 G T²

                                          19.6 =   4.9   T²

Divide each side by 4.9 :       4  =           T²

Square root each side:           2  =          T

When an object is dropped in Earth gravity,
it takes  2  seconds to fall the first 19.6 meters.

Crazy boy [7]3 years ago
5 0
Earth's gravity is 9.807 m/s²

Using this we can divide 19.6/9.807 to get 1.999 seconds or two if you round.
You might be interested in
High blood levels of LDL cholesterol reduces your risk of developing heart
SVEN [57.7K]

Answer:

false

Explanation:

3 0
3 years ago
Read 2 more answers
How does a heat pump resemble a refrigeration system?
REY [17]
A heat pump is a device that is capable of transferring heat energy from a source of heat to what is known as the heat sink. It also moves thermal energy in the opposite direction of a spontaneous heat transfer through heat absorption from a cold space and releasing it to a warmer space.

When a heat pump is being utilized for heating, it employs the same principle with that of the refrigeration cycle used by an air conditioner or a refrigerator, but in the opposite direction since it releases heat into a conditioned space rather than the surrounding environment. Moreover, heat pump resembles much as refrigeration since it has the same components with the latter except for the presence of a reverse valve.
3 0
2 years ago
What carries energy
Fed [463]
Yes, electromagnetic waves do carry energy. In fact, every wave carries energy: that is, potential energy.
5 0
3 years ago
Read 2 more answers
What percentage of a lower trophic level's energy flows to the next higher trophic level? A. 1% b. 10% c. 50% d. 100% Please sel
ikadub [295]

Answer:

The answer is B; 10%

8 0
2 years ago
Describe how the design of a vacuum flask keeps the liquid inside hot ?
JulijaS [17]
The gap between the two flasks is partially evacuated of air creating a near vacuum which significantly reduces heat transfer by conduction or convection 
3 0
3 years ago
Read 2 more answers
Other questions:
  • Three beads are placed on the vertices of an equilateral triangle of side d = 3.4cm. The first bead of mass m1=140gis placed on
    13·1 answer
  • Construct a graph of position versus time for the motion of a dog, using the data in the table below. Explain how the graph indi
    8·1 answer
  • Imagine that you are working as a roller coaster designer. You want to build a record breaking coaster that goes 70.0 m/s at the
    5·1 answer
  • A runner has a speed of 5m/s and a mass of 130 kg what is his kinetic energy?
    13·2 answers
  • . Imagine that you are standing at the center of a giant bowl of gelatin. What type of wave will you make across the top of the
    5·1 answer
  • He had 5 dogs plus 2. Cats <br> How many did he have all together?
    9·2 answers
  • Sentences and facts for the laws of motion.
    15·1 answer
  • A lightning flash may transfer up to 14 C of charge through a potential difference of 107 V
    10·1 answer
  • A long ramp made of cast iron is sloped at a constant angle θ = 52.0∘ above the horizontal. Small blocks, each with mass 0.42 kg
    6·1 answer
  • Observe and compare the forces acting on the turtle and the cat.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!