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
wolverine [178]
1 year ago
6

14) A race car accelerates from rest to a velocity of 41 m/s in 480 m. What is the acceleration of the race car?

Physics
1 answer:
natka813 [3]1 year ago
8 0

Answer:

Explanation:

V₀ = 0 m/s

V = 41 m/s

S = 480 m

___________

a - ?

Distance traveled:

S =  (V² - V₀²) / (2*a)

Acceleration :

a = (V² - V₀²) / (2*S)

a = (41² - 0²) / (2*480) = 1.75 m/s²

You might be interested in
group of students is making model cars that will be propelled by model rocket engines. These engines provide a nearly constant t
iris [78.8K]

Answer:

increase.

Explanation:

According to the newton’s second law of motion force is expressed as product of mass and acceleration.

F = m a

If the force acting is constant, then.

m∝ \frac{1}{a}

That is if the mass of object increases the acceleration decreases and vice versa. The above equation is used when the force acting on the body is constant.

As the thrust force from the rocket engine is constant throughout there will be a variation in the mass or acceleration.

Thus, it won't stay the same.

As the weight of the car is maximum at the start because of the fuel present in the rocket engine and minimum at the end as the fuel burns throughout the journey of the car. Weight will be minimum at the end and hence acceleration is maximum at the end.

Thus, it won't decrease.

As the acceleration is going from minimum at the start to maximum at the end, therefore it is continuously increases throughout its journey.

Thus, it will increase.  

7 0
3 years ago
Consider a solenoid of length L, N windings, and radius b (L is much longer than b A current I). is flowing through the wire. If
wolverine [178]

Answer:

The magnetic field inside the solenoid would decrease by a factor of 2.

Explanation:

The magnetic field, B, of a solenoid of length L, N windings, and radius b with a current, I, flowing through it is given as:

B = (N * r * I) / L

If the length of the solenoid is doubled, 2L,the magnetic field becomes:

B2 = (N * r * I) / 2L

B2 = ½ B

The magnetic field will decrease by a factor of 2.

5 0
3 years ago
The force of magnitude F acts along the edge of the triangular plate. Determine the moment of F about point O. Find the general
Sever21 [200]

Answer:

The moment is 81.102 k N-m in clockwise.

Explanation:

Given that,

Force = 260 N

Side = 580 mm

Distance h = 370 mm

According to figure,

Position of each point

O=(0,0)

A=(0,-b)

B=(h,0)

We need to calculate the position vector of AB

\bar{AB}=(h-0)i+(0-(-b))j

\bar{AB}=hi+bj

We need to calculate the unit vector along AB

u_{AB}=\dfrac{\bar{AB}}{|\bar{AB}|}

u_{AB}=\dfrac{h\hat{i}+b\hat{j}}{\sqrt{h^2+b^2}}

We need to calculate the force acting along the edge

\hat{F}=F(u_{AB})

\hat{F}=F(\dfrac{h\hat{i}+b\hat{j}}{\sqrt{h^2+b^2}})

We need to calculate the net moment

\hat{M}=\hat{F}\times OA

Put the value into the formula

\hat{M}=F(\dfrac{h\hat{i}+b\hat{j}}{\sqrt{h^2+b^2}})\times(-b\hat{j})

\hat{M}=\dfrac{F}{\sqrt{h^2+b^2}}((h\hat{i}+b\hat{j})\times(-b\hat{j}))

\hat{M}=\dfrac{F}{\sqrt{h^2+b^2}}(-bh\hat{k})

\hat{M}=-\dfrac{bhF}{\sqrt{h^2+b^2}}

Put the value into the formula

\hat{M}=-\dfrac{580\times10^{-3}\times370\times10^{-3}\times260}{\sqrt{(370\times10^{-3})^2+(580\times10^{-3})^2}}

\hat{M}=-81.102\ \hat{k}\ N-m

Negative sign shows the moment is in clockwise.

Hence, The moment is 81.102 k N-m in clockwise.

5 0
3 years ago
Jenna built a completed electrical circuit. Jenna’s circuit illustrates what energy transformation?
lana [24]

The answer is D. Electrical energy can be transformed into both heat and light.

3 0
3 years ago
Read 2 more answers
When lifting weights, arch your lower back for extra strength. Is this true?
Aleksandr [31]

Answer:

No

Explanation:

6 0
3 years ago
Other questions:
  • Two identical objects are moving directly toward one another at the same speed v. ~v −~v m m What is the total kinetic energy of
    15·2 answers
  • A pulsar is a rapidly rotating neutron star. The Crab nebula pulsar in the constellation Taurus has a period of 33.5\times 10^{-
    10·1 answer
  • What does the term mccarthyism describe? To whom does it refer?
    11·1 answer
  • To maintain a constant speed, the force provided by a car's engine must equal the drag force plus the force of friction of the r
    10·1 answer
  • I'm not sure what to use help me please
    8·1 answer
  • During a test, a NATO surveillance radar system, operating at 12 GHz at 190 kW of power, attempts to detect an incoming stealth
    15·1 answer
  • Select the best answer for the question. 6. The first step in using time more efficiently is A. studying how successful people u
    9·2 answers
  • Car sitting on a drive way is that an kinetic or potential energy​
    11·1 answer
  • 35 POINTSS!!! PLSSSS HELLPPP!!!
    13·1 answer
  • There are many uses for permanent magnets and temporary magnets like an electromagnet. Electric appliances with electric motors
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!