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
Rasek [7]
3 years ago
10

A more realistic car would cause the wheels to spin in a manner that would result in the ground pushing it forward with a consta

nt force (in contrast to the constant power in part a). if such a sports car went from zero to 28.0 mph in time 1.50 s , how long would it take to go from zero to 56.0 mph ?
Physics
1 answer:
DochEvi [55]3 years ago
5 0

<span>If the sport car is moving in a constant force, it also means constant acceleration. <span>Regardless of friction, the constant power of the engine of the sport car implies that the kinetic energy of the car increases linearly with time. Therefore, if the car went from zero to 28.0 mph in time of 1.50 seconds, then the speed of the car will increase to 3 seconds if it will go from zero to 56.0 mph.</span></span>

 

You might be interested in
The​ time, t, required to drive a fixed distance varies inversely as the​ speed, r. It takes 9 hr at a speed of 20 ​km/h to driv
Harlamova29_29 [7]

Answer:

Time=7.84hrs

Explanation:

This is an inverse proportionality questions

Mathematically time t varies as 1/distance d

Hence T= dk/r

But speed r = distance/t

d= r*t= 9*20=180km/hr

We're k= constant of proportionality

At t=9hrs d=180km/hr

Hence k=r*t/d=20*9/1620=0.111

Finding t at at 1620km for 23km/hr

t=1620*0.111/23=7.84hrs

6 0
3 years ago
A person on a merry-go-round is constantly changing direction.<br> True or false
Elden [556K]
True. Because you’re always facing a different direction
6 0
3 years ago
Read 2 more answers
As your hand moves back and forth to generate longitudinal pulses in a spiral spring, your hand completes 3.19 back-and-forth cy
lesantik [10]

Explanation:

Since, it is given that one hand completes 3.19 vibrations in 8.46 sec. Therefore, in one second the number of vibrations will be as follows.

              \frac{3.19}{8.46}

                = 0.377 vibrations

Hence,  frequency (f) = 0.38 Hz

Now, formula to calculate the speed is as follows.

               v = f \times \lambda

or,        \lambda = \frac{v}{f}                  

                = \frac{0.6 cm/s}{0.38}

                = 1.57 cm

Thus, we can conclude that the wavelength is 1.57 cm.

3 0
3 years ago
At NASA's Zero Gravity Research Facility in Cleveland, Ohio, experimental payloads fall freely from rest in an evacuated vertica
Diano4ka-milaya [45]

Answer:

(a). Energy is 64,680 J

(b) velocity is 51.43m/s

(c) velocity in mph is 115.0mph

Explanation:

(a).

The potential energy P of the payload of mass m is at a vertical distance h is  

P =mgh.

Therefore, for the payload of mass m = 50kg at a vertical distance of h = 132 m, the potential energy is

P = (50kg)(9.8m/s^2)(132m)

\boxed{P = 64,680J}

(b).

When the payload reaches the bottom of the shaft, all of its potential energy is converted into its kinetic energy; therefore,

mgh= \dfrac{1}{2}mv^2

v= \sqrt{2gh}

v = \sqrt{2*9.8*135}

\boxed{v = 51.43m/s}

(c).

The velocity in mph is

\dfrac{51.43m}{s} * \dfrac{3600s}{hr} * \dfrac{1mile}{1609.34m}

\boxed{v= 115.0mph}

5 0
3 years ago
a spring has a force constant of 100 n/m and an unstretched length of 0.07 m. one end is attached to a post that is free to rota
Digiron [165]

F equals 3N with respect to the circle's center, moving in the same direction as the centripetal acceleration.

<h3>How much centripetal force is there in a centrifuge?</h3>

Centripetal force is the force that pushes an item in the direction of its center of curvature. It is fundamental to how a centrifuge operates.

<h3>On a roller coaster, what is centripetal force?</h3>

An item travelling in a circle is pushed inward toward what is known as the center of rotation, which is essentially what a roller coaster accomplishes when it travels through a loop. The force that maintains an object moving along a curved route is this pull toward the center, or centripetal force.

To know more about centripetal force visit:-

brainly.com/question/11324711

#SPJ4

6 0
1 year ago
Other questions:
  • A balloon holds 5.00 mol of a mono-atomic gas at a temperature of 5.00oC and at a pressure of 1.20 atm. The gas isothermally abs
    10·1 answer
  • Helen sees Andy at the dance that she crush on and decides to chase him down. Find speed if she runs 87.3m in 4.9s
    14·1 answer
  • Koi is climbing through a crevice and places her feet so that her body is perpendicular as shown below she then rest in this spo
    11·1 answer
  • How many miles long is burma from north to south?
    6·1 answer
  • Match the atom to the number of electrons it is likely to gain/lose.
    9·1 answer
  • Calculate equivalent resistance in the following between points P and Q​
    12·2 answers
  • What is the economic application of changes in states of matter
    5·1 answer
  • A centripetal force of 250 N is exerted on a 2.2 kg discus as it rotates uniformly in a horizontal circle of radius 0.85 m. Calc
    8·1 answer
  • In the ballistic pendulum experiment, a bullet of mass 0.06 kg is fired
    5·1 answer
  • 3. Which of these will remain unchanged when a sound wave travels from the air to water?
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!