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
pychu [463]
3 years ago
10

A ball is dropped from the top of a 77 m building. With what speed does the ball hit the ground? _________ m/s

Physics
1 answer:
vitfil [10]3 years ago
3 0

Answer:

38.87 m/s

Explanation:

Given that the ball is dropped from a height = 77 m

u = 0 m/s

s = 77 m

a = g = 9.81 m/s²

Applying the expression as:

v^2-u^2=2as

Applying values as:

v^2-u^2=2as\\\Rightarrow v=\sqrt{2as+u^2}\\\Rightarrow v=\sqrt{2\times 9.81\times 77+0^2}\\\Rightarrow v=38.87\ m/s

<u>The speed with which the ball hit the ground = 38.87 m/s</u>

You might be interested in
A car travels at a speed of 40 m/s for 29.0 s;<br>what is the distance traveled by the car?
lianna [129]

Answer: 1160 m

Explanation:

Speed = distance / time. Plug in 40 m/s for speed and 29 s for time in order to get the distance, 1160 m.

8 0
2 years ago
What does Electromagnetic induction mean?
mina [271]

Answer:

<u>Electromagnetic introduction</u> is the production of an electromotive force (voltage) across an electrical conductor in a changing magnetic field.

  • <em><u>Step up transformers</u></em><u> is</u> a transformer in which the output (secondary) voltage is greater than its input (primary) voltage is called a step-up transformer. The step-up transformer decreases the output current for keeping the input and output power of the system equal.

  • <u><em>Step down transformer is </em></u><em>a transformer in which the output (secondary) voltage is less than its input (primary) voltage is called a step-down transformer. The number of turns on the primary of the transformer is greater than the turn on the secondary of the transformer.</em>

<em />

<u>The difference between them:</u>

A transformer is a static device which transfers a.c electrical power from one circuit to the other at the same frequency, but the voltage level is usually changed. For economical reasons, electric power is required to be transmitted at high voltage whereas it has to be utilized at low voltage from a safety point of view. This increase in voltage for transmission and decrease in voltage for utilization can only be achieved by using a step-up and step-down transformer.

Hopefully this helped.

7 0
3 years ago
I'm not sure what equation to use.
Lelechka [254]
I would think that you would multiply then divide
7 0
4 years ago
If magnet A can pick up 3 steel paper clips and magnet B can pick up 11 gold paper clips and which one is stronger?
Nutka1998 [239]
The answer to your question is b
8 0
3 years ago
_____ is a closed loop of conductors through which charges flow.
Verdich [7]
The answer is c. Hope that helped
8 0
3 years ago
Read 2 more answers
Other questions:
  • How much time would be saved if the delicious chicken breast were thawed on the kitchen counter instead, given that room tempera
    13·1 answer
  • A car traveled at an average speed of 65 mph for 10 hrs how fer did it travel
    14·2 answers
  • you are carrying a stack of boxes across the room. when you come to a sudden stop, some of the boxes fall forward off of the top
    5·1 answer
  • Why does cold weather feel colder inside?
    5·1 answer
  • How much heat is necessary to change 350 g of ice at -20 degrees Celsius to water at 20 Celsius?
    9·1 answer
  • It took an American football lineman 14 seconds to complete 10 repetitions of a 102 kg bench press. If the bar had to travel 1.4
    12·1 answer
  • Explain how Rutherfords' gold foil experiment explains how this experiment confirms the nuclear model of the atom and the idea t
    15·1 answer
  • Steam at 400C has a specific volume of 0.02m3/kg. Determine the pressure of the steam based on a) the ideal gas equation b) the
    14·1 answer
  • If the third charge (–| q 3 |) is placed at point P, but not held fixed, it will experience a force and accelerate away from the
    14·1 answer
  • Which of these is a characteristic of the Milky Way galaxy
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!