Physics, 21.10.2019 23:30 jessicannoh5965

A0.450-kg ice puck, moving east with a speed of 5.60m/s , has a head-on collision with a 0.950-kg puck initially at rest. assume that the collision is perfectly elastic. (1)- what is the speed of the 0.450-kg puck after the collision? (2)- what is the direction of the velocity of the 0.450- puck after the collision? (i)- to the east (ii)- to the west (3)- what is the speed of the 0.950-kg puck after the collision? (4)- what is the direction of the velocity of the 0.950-kg puck after the collision? (i)-to the east (ii)- to the west

Answers: 2

Show answers

Answers

Answer from: neariah24

1) The disc speed of 0.450 kg is vif = -2.0 m / s

2) The disc is receding because the negative bone velocity is heading west

3) Disc speed 0.950 kg V2f = 3.6 m / s

4) The disk follows the initial direction of the light disk, bone moves east

Explanation:

For the problems of crashes we have to define a system in this case the system is formed by the two disks, write the amount of movement before and after the crash

p₀ = m₁ v₁₀ + 0

pf = m₁ v₁f + m₂ v₂f

For the system during the crash all forces are internal, so the moment is preserved

po = pf

m₁ v₁₀ = m₁ v₁f + m₂ v₂f

Like elastic shock, kinetic energy is also conserved

Ko = Kf

½ m₁ v₁₀² = ½ m₁ v₁f² + ½ m₂ v₂f²

Let's write the system of equations

m₁ (v₁₀ -v₁f) = m₂ v₂f

m₁ (v₁₀² - v₁f²) = m₂ v₂f²

We replace the first in the second

m₁ (v₁₀² - v₁f²) = m₂ [m₁ (v₁₀ -v₁f) / m₂]²

m₁ (v₁₀² - v₁f²) = [m1² (v₁₀ -v₁f)² / m₂

(v₁₀² - v₁f²) = [m₁ (v₁₀ -v₁f)² / m₂

m₁ (v₁₀ - v₁f) (v₁₀ + v₁f) = [(v₁₀ -v₁f)² m₁ / m₂

(v₁₀ + v₁f) = (v₁₀ -v₁f) m₁ / m₂

v₁f (1+ m₁ / m₂) = v₁₀ (m₁ / m₂ -1)

v₁f (m₂ + m₁) / m₂ = v₁₀ (m₁ -m₂) / m₂

v₁f = v₁₀ [(m₁ -m₂) / (m₁ +m₂)]

We calculate

V₁f = 5.6 [(0.450 -0.950) / ((0.450+ 0.90)] = 5.6 (-0.500 /1.4)

V₁f = - 2.0 m / s

The negative sign indicates that the disk goes back

m₁ (v₁₀ -v₁f) = m₂ v₂f

v₂f = m₁ / m₂ (v₁₀ -v₁f)

v₂f = 0.450 / 0.950 (5.6 - (-2))

v₂f = 3.6 m / s

Let's write the results

1) The disc speed of 0.450 kg is vif = -2.0 m / s

2) The disc is receding because the negative bone velocity is heading west

3) Disc speed 0.950 kg V2f = 3.6 m / s

4) The disk follows the initial direction of the light disk, bone moves east

Answer from: Quest

the answer is b

explanation:

Answer from: Quest

Nps pollution is caused by rainfall or snowmelt moving over and through the ground. nonpoint source pollution can include: excess fertilizers, herbicides and insecticides from agricultural lands and residential areas. oil, grease and toxic chemicals from urban runoff and energy production

Other questions on the subject: Physics

Physics, 21.06.2019 14:10, F00Dislife

Amachinist needs to remove a tight fitting pin of material a from a hole in a block made of material b. the machinist heats both the pin and the block to the same high temperature and removes the pin easily. what statement relates the coefficient of thermal expansion of material a to that of material b? a) the situation is not possible, heating block b will shrink the hole in the material as the material expands with increasing temperatureb) material b has the same coefficient of expansion as does material ac) material b has a negative coefficient of expansion and a has a positive coefficient of expansiond) material a has a greater coefficient of expansion than does material be) material b has a greate

Answers: 1

continue

Physics, 22.06.2019 09:00, kiarajack456

Why can blue light and yellow light combine to produce white light? question 17 options: they are both primary colors of light. they absorb each other's wavelengths. because blue, yellow, and white are primary colors. they are complementary colors of light.

Answers: 1

continue

Physics, 22.06.2019 12:00, angelamirga332

Asolid round steel rod 6.25 mm in diameter and 375 mm long is rigidly bonded to the end of solid square brass rod 25 mm on a side and 300 mm long. the geometric axes of the bare are along the same line. an axial tensile force of 5.4 kn is applied at the extreme ends of the assembly. for steel e = 200 gpa and for brass e = 90 gpa. determine the total elongation for the assembly.

Answers: 1

continue

Physics, 22.06.2019 12:30, olsen6932

As part of your daily workout, you lie on your back and push with your feet against a platform attached to two stiff springs arranged side by side so that they are parallel to each other. when you push the platform, you compress the springs. you do an amount of work of 79.0 j when you compress the springs a distance of 0.230 m from their uncompressed length. (a) what magnitude of force must you apply to hold the platform in this position? (b)how much additional work must you do to move the platform a distance 0.230 m farther? (c) what maximum force must you apply to move the platform a distance 0.230 m farther?

Answers: 1

continue

You know the right answer?

A0.450-kg ice puck, moving east with a speed of 5.60m/s , has a head-on collision with a 0.950-kg pu...