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
Musya8 [376]
3 years ago
13

A ball, which has a mass of 1.25 kg, is thrown straight up from the top of a building 225 meters tall with a velocity of 52.0 m/

s. what will be the momentum of this ball just as it reaches the ground
Physics
1 answer:
Anastasy [175]3 years ago
3 0

First we will find the speed of the ball just before it will hit the floor

so in order to find the speed of the cart we will first use energy conservation

KE_i + PE_i = KE_f + PE_f

\frac{1}{2}mv_i^2 + mgh = \frac{1}{2}mv_f^2 + 0

\frac{1}{2}(1.25)(52)^2 + 1.25(9.8)(225) = \frac{1}{2}(1.25)v_f^2

So by solving above equation we will have

v_f = 84.3 m/s

now in order to find the momentum we can use

P = mv

P = 1.25 \times 84.3

P = 105.4 kg m/s

You might be interested in
A gadget of mass 21.85 kg floats in space without motion. Because of some internal malfunction, the gadget violently breaks up i
BaLLatris [955]

Answer:

v_3=8.622\ m.s^{-1}

Explanation:

Given:

  • mass of the gadget, m=21.85\ kg
  • mass of fragment 1, m_1=6.42\ kg
  • mass of fragment 2, m_2=8.26\ kg
  • velocity of fragment 1, v_1=6.8\ m.s^{-1}
  • velocity of fragment 2, v_2=3.54\ m.s^{-1}
  • angle between the velocity 1 & 2, \theta=64\ ^{\circ}

<u>Now the mass of the third part:</u>

m_3=m-(m_1+m_2)

m_3=21.85-(6.42+8.26)

m_3=7.17\ kg

<u>The momentum of the gadget before and after collision is equal:</u>

m_3.v_3=m_1.v_1\cos\ \frac{\theta}{2} +m_2.v_2\cos \frac{\theta}{2}

7.17\times v_3=(6.42\times6.8+8.26\times3.54)\times \cos \frac{64}{2}

v_3=8.622\ m.s^{-1}

Refer schematic for more clarity.

6 0
2 years ago
Two concentric current loops lie in the same plane. The smaller loop has a radius of 3.6 cm and a current of 12 A. The bigger lo
puteri [66]

Answer:

the radius of bigger loop = 6 cm

Explanation:

given,

two concentric current loops

smaller loop radius = 3.6 cm

]current in smaller loop = 12 A

current in the bigger loop = 20 A

magnetic field at the center of loop = 0

Radius of the bigger loop = ?

B_t = B_1 + B_2

0 = \dfrac{\mu_0I_1}{2R_1} +\dfrac{\mu_0I_2}{2R_2}

now, on solving

\dfrac{I_1}{R_1} = \dfrac{I_2}{R_2}

R_2 = I_2\dfrac{R_1}{I_1}

       = 20\times \dfrac{3.6}{12}

       = 6 cm

hence, the radius of bigger loop = 6 cm

7 0
3 years ago
I need heelp plzzzzz can anyone heelp mee
sveticcg [70]

Answer:

e) 1.04

Explanation:

4 0
3 years ago
Read 2 more answers
In a collision that is not perfectly elastic, what happens to the mechanical energy of the system?
joja [24]
C.

Thanks me later, that's my answer.
5 0
3 years ago
The_______ of an object is given relative to an origin
Setler79 [48]
The slope of an object is given relative to an origin.
8 0
3 years ago
Other questions:
  • An electron and a proton, moving side by side at the same speed, enter a 0.020-T magnetic field. The electron moves in a circula
    15·1 answer
  • A 68.5 kg astronaut is doing a repair in space on the orbiting space station. she throws a 2.25 kg tool away from her at 3.20 m/
    6·1 answer
  • GUESS WHAT? I'LL MAKE YOU BRAINLIEST!!! PLEASE ANSWER THING QUICKLY!
    7·1 answer
  • A man holding a rock sits on a sled that is sliding across a frozen lake (negligible friction) with a speed of 0.460 m/s. The to
    14·2 answers
  • You are in a speedboat on a river moving in the same direction as the current. The speedometer on the boat shows that its speed
    7·1 answer
  • PLEASE HELP WILL GIVE BRAINLIEST
    5·1 answer
  • During a race there are lots of forces that are exerted on a race car. One of these forces is friction.
    6·1 answer
  • A vector A~ has a negative x component 2.89 units in length and a positive y component 3.17 units in length. The vector A~ can b
    13·1 answer
  • What is the net force on a truck if the force of friction is 31 N and the force of the engine is 79 N?
    13·1 answer
  • Convert time from 12-hour to 24-hour clock. ​
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!