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
valkas [14]
3 years ago
11

A rock of mass m is thrown straight up into the air with initial speed |v0 | and initial position y = 0 and it rises up to a max

imum height of y = h. A second rock with mass 2m (twice the mass of the original) is thrown straight up with an initial speed of 2|v0 |. What maximum height does the second rock reach?
Physics
1 answer:
REY [17]3 years ago
7 0

Answer:

Explanation:

Case 1:

mass = m

initial velocity = vo

final velocity = 0

height = y

Use third equation of motion

v² = u² - 2as

0 = vo² - 2 g y

y = vo² / 2g       ... (1)

Case 2:

mass = 2m

initial velocity = 2vo

final velocity = 0

height = y '

Use third equation of motion

v² = u² - 2as

0 = 4vo² - 2 g y'

y ' = 4vo² / 2g

y' = 4 y

Thus, the second rock reaches the 4 times the distance traveled by the first rock.

You might be interested in
a 1811kg car speeds up from rest when a traffic light turns green until it reaches a speed of 23m/s. how much work was done on t
sattari [20]

Answer:

The work done by the frictional force, W = 612565.32 J

Explanation:

Given data,

The mass of the car, m = 1811 kg

The initial velocity of the car, u = 0 m/s

The final velocity of the car, v = 23 m/s

Let the time period of the car be, t = 3 s

The acceleration of the car,

                              a = (v-u) /t

                                 = (23 - 0)/ 3

                                = 7.67 m/s²

The normal force acting on the car,

                         F = mg

                             = 1811 kg x 9.8 m/s²

                              = 17747.8 N

The displacement of the car,

                             s = ut + ½ at²

                                 = 0 + ½ x 7.67 x 3²

                                 = 54.52 m

The work done by the frictional force,

                              W = F · S

                              W = 17747.8 N x 54.52 m

                                   = 612565.32 J

Hence, the work done by the frictional force, W = 612565.32 J

3 0
3 years ago
One kilogram-meter per second squared is also equal to what unit
yan [13]
Metres/second² is acceleration. maybe a bit more clarification?

8 0
3 years ago
WILL MARK BRAINLIST!!! only for correct answer<br> NEED CORRECT ANSWER ASAPPP
Nataly [62]

Answer:

number 4

Explanation:

The reflection of light happens when the light bounces off the reflecting surface. That is described by the last (bottom) schematics.

Therefore, select answer number 4.

5 0
3 years ago
How can you show positive body languages with your mouth
sergey [27]
By just smiling. It normally makes you look more happy.And if your happy that's positive body languge
7 0
3 years ago
Which of the following happens to an object in uniform circular motion?
podryga [215]

Answer:

As an object moves in a circle, it is constantly changing its direction. ... Accelerating objects are objects which are changing their velocity - either the speed (i.e., magnitude of the velocity vector) or the direction. An object undergoing uniform circular motion is moving with a constant speed.

5 0
3 years ago
Other questions:
  • Is 2.5m/s faster than 4m/s
    5·1 answer
  • An astronaut tightens a bolt on a satellite in orbit. He rotates in a direction opposite to that of the bolt, and the satellite
    14·1 answer
  • Johannes Kepler started his astronomy career as an assistant to??
    9·1 answer
  • In triangle​ ABC, the angles A and B have the same​ measure, while the measure of angle C is 21degrees larger than the measure o
    15·1 answer
  • What equation do we use to solve?
    15·1 answer
  • jaka siła pełni rolę siły dośrodkowej w przypadku krzesełka kręcocego się na karuzeli przy akrobacji lotniczych
    13·1 answer
  • 3.
    8·1 answer
  • What causes satellites to remain in orbit above Earth?
    9·1 answer
  • When we say charge is conserved, we mainly mean that charge can be _________. View Available Hint(s)for Part A constant in all b
    14·1 answer
  • The air temperature is 20°C. You are swimming underwater when you hear a boat noise. Then, 3.5 s later, you hear a crash. If the
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!