All categories

3 years ago

Sayid made a chart listing data of two colliding objects.

Physics

1 answer:

Artemon [7]3 years ago

7 0

Answer:

velocity of combined objects is 6 m/s

Explanation:

As per law of conservation of momentum

total momentum before collision = total momentum after collision

since the two objects sticks together after collision so we will have

$m_1v_{1i} + m_2v_{2i} = (m_1 + m_2) v$

Now plug in all values in it

$300(10) + 100(-6) = (300 + 100) v$

$3000 - 600 = 400(v)$

$2400 = 400 v$

$v = 6 m/s$

so the missing value in the table is velocity which is 6 m/s

You might be interested in

A horizontal spring with a spring constant 100 N/m is compressed 20cm and used to launch a 2.5kg box across a frictionless, hori

Verdich [7]

Answer:

d = 0.544 m

Explanation:

To solve this problem we must work in two parts: one when the surface has no friction and the other when the surface has friction

Let's start with the part without rubbing, let's find the speed that the box reaches., For this we use the conservation of mechanical energy in two points: maximum compression and when the box is free (spring without compression)

Initial, maximum compression

Em₀ = Ke = ½ k x²

Final, free box without compressing the spring

$Em_{f}$ = K = ½ m v²

Emo = $Em_{f}$

½ k x² = ½ m v²

v = √ (k / m) x

Let's reduce the SI units measures

x = 20 cm (1m / 100cm) = 0.20 m

v = √ (100 / 2.5) 0.20

v = 1,265 m / s

Let's work the second part, where there is friction. In this part the work of the friction force is equal to the change of mechanical energy

$W_{fr}$ = ΔEm = $Em_{f}$ - Em₀

$W_{fr}$ = - fr d

Final point. Stopped box

$Em_{f}$ = 0

Starting point, starting the rough surface

Em₀ = K = ½ m v²

With Newton's second law we find the force of friction

fr = μ N

N-W = 0

N = W = mg

fr = μ mg

-μ m g d = 0 - ½ m v²

d = ½ v² / (μ g)

Let's calculate

d = ½ 1,265² / (0.15 9.8)

d = 0.544 m

6 0

3 years ago

A processing speed of _____ gigahertz (ghz) represents two billion cycles per second.

victus00 [196]

The word giga is a prefix in the metric system which stands for a factor of billion while the hertz is a unit which is also equivalent to cycle / s (cycle per second).

Therefore the answer to this is:

<span>2 gigahertz = 2 billion cycles per second</span>

3 0

4 years ago

A current of 0.8 A flows through the motor for 3 minutes. Calculate the total charge in this time.

mixas84 [53]

$▪▪▪▪▪▪▪▪▪▪▪▪▪ {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪$

The given terms are :

Current = 0.8 Amperes

Time = 3 minutes = 3 × 60 = 180 seconds

we know that,

$current = \dfrac{charge}{time}$

now, let's solve for charge (q) :

$0.8 = \dfrac{q}{180}$

$q = 180 \times 0.8$

$q = 144 \:$

Total Charge (q) = 144 Coulombs

7 0

3 years ago

Resultant Displacement. I WILL GIVE BRAINLIEST!!!!

aleksley [76]

Answer:

displacement will be 83km from the marker that reads 249km.

8 0

3 years ago

An ice skater starts with a velocity of 2.25 m/s in a 50.0 degree direction. After 8.33s, she is moving 4.65 m/s in a 120 degree

Westkost [7]

Answer:

Explanation:

Lets decompose the initial velocity into its components:

Vi = 2.25 m/s

Vix = Vi x cos(50)

Viy = Vi x sin(50) = 2.25 x sin(50) = 1.724

Then decompose the final velocity:

Vf = 4.65

Vfx = Vf x cos(120)

Vfy = Vf x sin(120) = 4.65 x sin(120) = 4.027

After that we can use:

Vfy = Viy + ay*t

ay = (Vfy - Viy)/t

ay = (4.027 - 1.724) / 8.33

ay = 0.276

5 0

4 years ago