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
jolli1 [7]
2 years ago
6

A skier starting from rest skis straight down a slope 50 meters long in 5.0 seconds. What is the magnitude of the acceleration.

Physics
1 answer:
3241004551 [841]2 years ago
6 0
His average speed all the way is

                   (50 meters) / (5 sec)  =  10 m/s .

But, if the acceleration is uniform all the way down, then

            Average speed  =  (1/2) (start speed + end speed)

Start speed  =  0.
So
             Average speed  =  (1/2) (0 + end speed)

                                     =  (1/2) of end speed .

                   10 m/s        = (1/2) of end speed

               End speed (at the bottom)  =  20 m/s .

Magnitude of acceleration = (change in speed) / (time for the change)

                                      =     (20 m/s)            /    (5 sec)

                                       =                4 m/s²  .
You might be interested in
On a popular amusement park ride, the riders stand along the inside wall of a large cylinder with a diameter of 8.27 m. The cyli
____ [38]

Answer:

Explanation:

D = 8.27 m   ⇒  R = D / 2 = 8.27 m / 2 = 4.135 m

ω = 0.66 rev/sec = (0.66 rev/sec)*(2π rad/1 rev) = 4.1469 rad/s

We can apply the equation

Ff = W  ⇒  μ*N = m*g   <em>(I)</em>

then we have

N = Fc = m*ac = m*(ω²*R)

Returning to the equation <em>I</em>

<em />

μ*N = m*g    ⇒    μ*m*ω²*R = m*g   ⇒ μ = g / (ω²*R)

Finally

μ = (9.81 m/s²) / ((4.1469 rad/s)²*4.135 m) = 0.1379

3 0
3 years ago
HELP ASAP!!
andriy [413]

Answer:

This is false becuase different object weigh different

Thank you!

Explanation:

3 0
2 years ago
Which of the folltrue or false: the ratio of heat exchange in conduction is independent of exposure time.owing techniques uses e
Sliva [168]

True conditions

Efficiency of Heat Exchanger are as below:

the heat exchange process between two fluids with different temperatures using solid walls occurs in various engineering applications. The tool to achieve this exchange is a heat exchanger. Some applications like air conditioning, power generation, waste heat recovery, and chemical processing use this device.

The basis of the work of a heat exchanger is that the hot fluid enters the heat exchanger at temperature T1 and its heat capacity is Chot. Also, the cold fluid with the heat capacity of Ccold enters temperature t1; in the meantime, the hot fluid loses its heat, and its temperature drops to T2. It delivers heat to the cold fluid to increase its temperature to t2 and leave the heat exchanger at this temperature.

To learn more about Heat Exchanger

brainly.com/question/22595817

#SPJ4

6 0
1 year ago
Steve does 80 J of work to a rope threaded through a pulley and attached to a crate of anvils. The tension of the rope is 10 N a
Ivahew [28]

Answer:

The Answer is (B)

Explanation:

6 0
3 years ago
Read 2 more answers
ASAP ONLY CORRECT ANSWERS PLEASEEEEEEEEEEEEEEEEEEEEEEEEEEEE I RLLY NEED HELPPPPPPP
nadya68 [22]

Answer:

attached below

Explanation:

5 0
3 years ago
Other questions:
  • Star temperature is indicated by?
    13·1 answer
  • A Each time he does one pushup, Jose, who has a mass of 89kg, raises his center of mass by 25 cm. He completes an impressive set
    9·1 answer
  • Which factor makes the mesosphere difficult to study? It is too high for weather balloons It is too high for satellites to obser
    12·1 answer
  • Consider shining a laser through a small circular hole. The resulting diffraction pattern will look like a bullseye - a series o
    13·1 answer
  • A person pushes a 25kg box across a horizontal frictionless surface with a force of 200 Newtons.
    6·1 answer
  • How much force is required to accelerate a 12 kg mass at m 5 m/s
    13·1 answer
  • Please help me to solve this, I don’t really know what to do.
    14·1 answer
  • What is a sound of electronic?​
    15·1 answer
  • Q: Explain the shape of the I-V graph of the filament lamp?<br>​
    5·1 answer
  • P = Patm + pgh is which law
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!