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
arsen [322]
4 years ago
12

Two soccer players kick a soccer ball back and forth along a straight line. The first player kicks the ball 16 m to the right to

the second player. The second player kicks the ball to the left weakly; it only moves 3.1 m before stopping. (Consider the right to be the positive direction. Where applicable, indicate the direction with the sign of your answer. All distances are in meters.)
Physics
1 answer:
Oliga [24]4 years ago
5 0

Answer:

a

The total distance is d_t =19.1 m

b

The displacement is

  D_t = 12.9m

Explanation:

From the question we are told that

        Distance traveled by the ball for first player d_f = 16m to the right

        Distance  traveled by the ball for second player d_s = 3.1 m to the left

       

The total distance traveled by the ball is mathematically represented as

                   d_t = d_f + d_s

Substituting values

                  d_t = 16 + 3.1

                  d_t =19.1 m

The displacement is mathematically represented as

              D_t  = d_f -d_s

This is because displacement deal with direction and from the question we are told that right is positive and left is negative

          Substituting values  

                D_t = 16 -3.1

                 D_t = 12.9m

     

You might be interested in
A thin, uniform metal bar, 2.00 m long and weighing 90.0 N, is hanging vertically from the ceiling by a frictionless pivot. Sudd
matrenka [14]

Answer:

(a) The "angular speed" is 5.88 rad/s.

Explanation:

Given values,

The length of the bar is L = 2m

The weight of the bar is w = 90 N

The metal bar is hanging vertically from the ceiling by a frictionless pivot  

The mass of the ball is m = 3kg

The distance between the ceiling and the ball is d = 1.5m

\text { The "initial speed of the ball" is } V_{i}=10 \mathrm{m} / \mathrm{s}

\text { The "final speed of the ball" is } V_{f}=6 \mathrm{m} / \mathrm{s}

(a) Calculating the angular speed:    

W_{\mathrm{f}}=\left(3 \mathrm{mg} \mathrm{d} \frac{V_{i}+V_{f}}{w l^{2}}\right)

W_{f}=\left(3 \times 3 \times 9.8 \times 1.5 \times \frac{10+6}{90 \times 2^{2}}\right)

W_{f}=\frac{2116.8}{360}

\mathrm{W}_{\mathrm{f}}=5.88 \mathrm{rad} / \mathrm{s}

The angular speed is 5.88 rad/s.

(b) The "angular momentum" is conserved because the torque is not exerted by "the pivot" on the system about the "axis of rotation" but the "linear momentum" is not conserved because "the pivot" exerts a "vertical" and a "horizontal force" on the system during the collision.

8 0
4 years ago
Dan's plant will require two shifts of skilled workers, seven days a week. As he does his research, he will pay particular atten
givi [52]
D - performance measures. 

If Dan is starting his plant, he will want to see if his new workers are performing the way he wants them to perform in order to meet the requirements for the amount of product he would like to produce on a weekly basis. This can be only done if he will pay special attention to different performance measures. 
4 0
3 years ago
Read 2 more answers
A 20 kg box on a horizontal frictionless surface is moving to the right at a speed of 4.0 m/s. The box hits and remains attached
yanalaym [24]

Answer:

Work done by the spring is negative

Explanation:

We can answer this question by thinking what is the force acting on the box.

In fact, the force acting on the box is the restoring force of the spring, which is given by Hooke's Law:

F=-kx

where

k is the spring constant

x is the displacement of the box with respect to the equilibrium position of the spring

The negative sign in the equation indicates that the direction of the force is always opposite to the direction of the displacement: so, whether the spring is compressed or stretched, the force applied by the spring on the box is towards the equilibrium position.

The work done by the restoring force is also given by

W=Fx cos \theta

where

F is the restoring force

x is the displacement

\theta is the angle between the direction of the force and the displacement

Here we know that the force is always opposite to the displacement, so

\theta=180^{\circ} \rightarrow cos \theta =-1

Which means that the work done by the spring is always negative, since the direction of the restoring force is always opposite to the direction of motion.

7 0
3 years ago
When electric current is flowing in a metal, the electrons are movinga. at nearly the speed of light.b. at the speed of sound in
yaroslaw [1]

Answer:

Option (d)

Explanation:

The electrons in a conductor moves with the drift velocity when the electric current is flowing through the conductor.

The drift velocity is due to the applied electric field across the conductor.

8 0
3 years ago
A surface completely surrounds a 3.3 × 10-6 C charge. Find the electric flux through this surface when the surface is (a) a sphe
KengaRu [80]

Answer:

Electric flux in a) , b) and c) is same which is   0.373 × 10 ⁶ N m²/C

Explanation:

given,

surface charge (q) = 3.3 × 10⁻⁶ C

to calculate electric flux = ?

a) radius = 0.76 m

area of sphere = 4 π r²

electric flux = \dfrac{q}{\varepsilon}

\varepsilon = 8.85 \times 10^{-12} C^2/Nm^2

electric flux =  \dfrac{3.3 \times 10^{-6}}{8.85 \times 10^{-12} }

flux = 0.373 × 10 ⁶ N m²/C

electric flux in the other two cases will also be same as electric flux is independent of area

so, Electric flux in a) , b) and c) is same which is   0.373 × 10 ⁶ N m²/C

5 0
4 years ago
Other questions:
  • An ideal gas at 25.8°C and a pressure 1.20 x 10^5 Pa is in a container having a volume of 1.00 L. (a) Determine the number of mo
    5·1 answer
  • A force of 16.88 n is applied tangentially to a wheel of radius 0.340 m and causes an angular acceleration of 1.20 rad/s2. What
    15·1 answer
  • A bullet is fired through a board, 14.0 cm thick, with its line of motion perpendicular to the face of the board. if it enters w
    7·2 answers
  • The process that keeps heat from being transferred between two substances is
    11·1 answer
  • You have to design a loop-the-loop for a new amusement park so that when each car passes the top of the loop inverted (upside-do
    12·1 answer
  • A storage tank contains a liquid at depth y where y=0 when the tank is half full. liquid is withdrawn at a constant flow rate q
    10·1 answer
  • What energy does a spillway produce?​
    6·2 answers
  • The body breaks down or converts most carbohydrates into the
    5·2 answers
  • Alerto
    12·1 answer
  • The amount of heat that is needed to raise the temperature of 1
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!