All categories

2 years ago

Practice Problems

Physics

1 answer:

aleksandrvk [35]2 years ago

4 0

(1) The distance traveled by Thomas is 190 m

(2) The displacement of Thomas is 100 m forward

(3) The velocity of Thomas is 0.056 m/s

<em>"Your question is not complete, check the image uploaded for the picture of this motion",</em>

(1) Distance is the sum of the total path covered.

first distance to cafe = 100 m

second distance to library = 45 m

third distance back to the cafe = 45 m

The total distance = 100 + 45 + 45 = 190 m

The distance traveled by Thomas is 190 m

(2) Displacement is the change in the position of an object;

Initial displacement forward = (100 + 45) m

Final displacement backward = 45 m

The total displacement = 145 m - 45 m = 100 m forward

The displacement of Thomas is 100 m forward

(3) The velocity of Thomas is calculated as the change in displacement per change in time.

the change in displacement = 100 m

the time of motion, t = 30 mins = 30 x 60 = 1800 s

$v = \frac{\Delta x}{\Delta t} = \frac{100 \ m}{1800 \ s} = 0.056 \ m/s$

Learn more here: brainly.com/question/17345815

You might be interested in

In which of these cases is a waiter doing work on the object

Gnom [1K]

Section 2 is right,, i think. good luck

8 0

3 years ago

Predict whether the changes in enthalpy, entropy, and free energy will be positive or negative for the melting of ice, and expla

BlackZzzverrR [31]

<span>Melting of ice is an endothermic process, meaning that energy is absorbed. When ice spontaneously melts, ΔH (change in enthalpy) is "positive". ΔS (entropy change) is also positive, because, becoming a liquid, water molecules lose their fixed position in the ice crystal, and become more disorganized. ΔG (free energy of reaction) is negative when a reaction proceeds spontaneously, as it happens in this case. Ice spontaneously melts at temperatures higher than 0°C. However, liquid water also spontaneously freezes at temperatures below 0°C. Therefore the temperature is instrumental in determining which "melting" of ice, or "freezing" of water becomes spontaneous. The whole process is summarized in the Gibbs free energy equation:
ΔG = ΔH – TΔS</span>

4 0

3 years ago

while test flying the new f-22 raptor fighter jet, test pilot bob put the plane in a horizontal loop while flying at the speed o

sveticcg [70]

Given

v = 343 m/s

ac = 5g

ac = 5*9.8 m/s^2

ac = 49 m/s^2

where,

v: velocity

ac = centripetal aceleration

Procedure

We call the acceleration of an object moving in uniform circular motion—resulting from a net external force—the centripetal acceleration ac; centripetal means “toward the center” or “center seeking”.

Formula

$\begin{gathered} a_c=\frac{v^2}{r} \\ r=\frac{v^2}{a_c} \\ r=\frac{(343m/s)^2}{49m/s^2} \\ r=2401\text{ m} \end{gathered}$

The minimum radius not to exceed the centripetal acceleration is 2401 m.

8 0

1 year ago

Wha is the movement of the balloon when brought near to the can after removing your hand?

DIA [1.3K]

Answer:

the answer is static electricity

3 0

3 years ago

How should the magnetic field lines be drawn for the magnets shown below?

sergeinik [125]

Option B is the correct answer that show how magnetic field lines should be drawn for the magnets shown in the figure.

<h3>What is Magnetic Line of Force ?</h3>

The Magnetic Line of Force of a magnet is defined as the line along which a free N - pole would tend to move if placed in the field of a line such that the tangent to it at any point gives the direction of the field at that point.

When the two unlike poles are placed to each other, there will be attraction. And when the two like poles are placed to each other, there will be repulsion. The reason is that the line of force tend to move from the north pole to the south pole.

From the given diagram, the two magnets are of the same south pole. They are of like pole and there will be repulsion between the two magnets.

Therefore, Option B is the correct answer that show how magnetic field lines should be drawn for the magnets shown in the figure.

Learn more about Magnetic Field Lines here: brainly.com/question/17011493

#SPJ1

5 0

2 years ago