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Likurg_2 [28]
3 years ago
6

Hurry. Answer quick!

Physics
1 answer:
Luda [366]3 years ago
3 0

Answer:

1) The change in momentum of the ball is 8 kgm/s

2) The total momentum of the bodies is 20 kgm/s

Explanation:

1)

Given;

mass of the ball, m = 2 kg

initial velocity of the ball, v₁ = 2 m/s

final velocity of the ball, v₂ = -2 m/s (the ball rebounds)

The change in momentum of the ball is given by;

ΔP = Δmv

ΔP = mv₁ - mv₂

ΔP = m(v₁ - v₂)

ΔP = 2(2 - (-2))

ΔP = 2(2 + 2)

ΔP = 8 kgm/s

2)

Given;

mass of the first body, m₁ = 5kg

mass of the second body, m₂ = 5kg

speed of the first body, v₁ = 2 m/s

speed of the second body, v₂ = 2 m/s

The total momentum of the bodies is given by

P = m₁v₁ + m₂v₂

P = (5 x 2) + (5 x 2)

P = 20 kgm/s

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5 0
2 years ago
Lifting book over your head is what type of energy
AleksandrR [38]

Answer:

potential energy

Explanation:

8 0
2 years ago
A chunk of paraffin (wax) has a mass of 50.4 grams and a volume of 57.9 cm3. What is the density of
ExtremeBDS [4]
Formula\ for\ density:\\\\
p=\frac{m}{V}\\p-density,\\m-mass,\\V-volume\\\\
Data:\\
m=50,4grams\\
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6 0
3 years ago
An object is 39 cm away from a concave mirrors surface along the principles axis. If the mirrors focal length is 9.50 cm, how fa
Tatiana [17]

Answer:

12.6 cm

Explanation:

We can use the mirror equation to find the distance of the image from the mirror:

\frac{1}{f}=\frac{1}{p}+\frac{1}{q}

where here we have

f = 9.50 cm is the focal length

p = 39 cm is the distance of the object from the mirror

Solving the equation for q, we find:

\frac{1}{q}=\frac{1}{f}-\frac{1}{p}=\frac{1}{9.50 cm}-\frac{1}{39 cm}=0.080 cm^{-1}\\q = \frac{1}{0.080 cm}=12.6 cm

5 0
3 years ago
Covert 60 mph to SI mks units
Flauer [41]

26.82m/s

Explanation:

Given:

   speed = 60mph

 problem: convert to m/s

To solve this problem, we have to find the right and appropriate conversion factor which equals to 1 to multiply this unit with:

   we are converting:

      miles to meters

      hours to seconds

    1.609km = 1mile

      1000m = 1km

  60s = 1 min

   60 min = 1hr

Now to convert from mph to m/s

  60 x    \frac{mi}{hr}  x  \frac{1.609km}{1mi}   x   \frac{1000m}{1km}  x \frac{1hr}{60min}  x \frac{1m}{60s}

  =  26.82m/s

   

learn more:

Conversion brainly.com/question/1548911

#learnwithBrainly

7 0
3 years ago
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