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
marysya [2.9K]
3 years ago
12

A brick is dropped from a high scaffold. a. What is its velocity after 4.0s ?

Physics
1 answer:
Ilia_Sergeevich [38]3 years ago
6 0

Answer:

A: 1.962

B: 3.924

Explanation:

g = G *M /R^2

g = 9.807*M/R^2 the gravitational constant of ground level on earth is about 9.807

g = 9.807*5lbs/R^2 the average brick is about 5 pounds.

g = 9.807*5*10^2.   I'm assuming the height is around ten feet to help you out.

with these numbers plugged in you get an acceleration of 0.4905 a final velocity after 4 seconds 1.962. It's height fallen after 4 seconds is 3.924.

( M = whatever the brick weighs it's not specified in the question)

(R = the distance from the ground or how high the scaffold is)

(hopefully you can just plug your numbers in there hope this helps)

You might be interested in
The splitting of an atom to produce energy is called a ________ reaction.
Rus_ich [418]
The correct answer is fission.
4 0
3 years ago
Read 2 more answers
In which situations is gravitational potential energy present?
Assoli18 [71]
Gravitational potential energy is associated with the shape or position of an object.
1.)When an object is placed at height h above ground, gravitational potential energy associated with it is given by,
P.E = mgh
2.)In projectile motion during upward motion, kinetic energy of object is converted into potential energy. 

6 0
3 years ago
What is the average velocity of atoms in 1.00 mol of neon (a monatomic gas) at 465 K? For m, use 0.0202 kg.
TiliK225 [7]

Answer: 757m/s

Explanation:

Given the following :

Mole of neon gas = 1.00 mol

Temperature = 465k

Mass = 0.0202kg

Using the ideal gas equation. For calculating the average kinetic energy molecule :

0.5(mv^2) = 3/2 nRt

Where ;

M = mass, V = volume. R = gas constant(8.31 jK-1 mol-1, t = temperature in Kelvin, n = number of moles

Plugging our values

0.5(0.0202 × v^2) = 3/2 (1 × 8.31 × 465)

0.0101 v^2 = 5796.225

v^2 = 5796.225 / 0.0101

v^2 = 573883.66

v = √573883.66

v = 757.55109m/s

v = 757m/s

5 0
4 years ago
When a 58g tennis ball is served, it accelerates from rest to a constant speed of 36 m/s. The impact with the racket gives the b
inysia [295]
We first calculate the acceleration on the ball using:
2as = v² - u²; u = 0 because ball is initially at rest
a = (36)²/(2 x  0.35)
a = 1850 m/s²
F = ma
F = 0.058 x 1850
= 107.3 Newtons
5 0
3 years ago
What does Einstein's famous equation for nuclear energy, E = mc^2, mean?
Nezavi [6.7K]
Yup the correct answer is A jus finished the quiz :)

hope i helped^_^

8 0
4 years ago
Other questions:
  • A squirrel (mass 0.9 kg) is running across the road at a speed 4.0 m/s. What is the
    7·2 answers
  • Let's begin by determining the equilibrium position of a seesaw pivot. You and a friend play on a seesaw.Your mass is____
    9·1 answer
  • Suppose, you are given three capacitors C1 = 2.0μF, C2 = 4.0μF, and C3 = 6.0μF.
    12·1 answer
  • Check my work please
    7·1 answer
  • Aaron is flying a helicopter with an air-relative velocity of 12.5 m/s to the West. A constant wind is also blowing the helicopt
    13·1 answer
  • a person is riding a bike and accelerating at 2.8m/s with a force of 100 n what is the mass of the rider and bicycle
    7·1 answer
  • Why does surface water disperse when touched with soap?
    9·2 answers
  • Sound travels slowest through gas because the atoms in a gas are further apart than the other states of matter.
    11·1 answer
  • Which statement accurately describes the motion of the object in the graph above over 10 seconds?
    5·1 answer
  • Does light have a shadow?
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!