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
Annette [7]
3 years ago
15

A bicyclist makes a trip that consists of three parts, each in the same direction (due north) along a straight road. during the

first part, she rides for 22 minutes at an average speed of 7.2 m/s. during the second part, she rides for 36 minutes at an average speed of 5.1 m/s. finally, during the third part, she rides for 8.0 minutes at an average speed of 13 m/s.
a. how far has the bicyclist traveled during the entire trip?
b. what is her average velocity for the entire trip?
Physics
1 answer:
Maru [420]3 years ago
3 0

part a)

path of the cyclist consist of three parts

during the first part, she rides for 22 minutes at an average speed of 7.2 m/s. during the second part, she rides for 36 minutes at an average speed of 5.1 m/s. finally, during the third part, she rides for 8.0 minutes at an average speed of 13 m/s.

total distance in first part

d_1 = 22*60 * 7.2 = 9504 m

total distance in second part

d_2 = 36*60 * 5.1 = 11016 m

total distance in third part

d_3 = 8 * 60 * 13 = 6240 m

so total distance would be

d = 9504 + 11016 + 6240 = 26760 m

part b)

average velocity is given as

v = \frac{displacement}{time}

v = \frac{26760}{(22 + 36 + 8)*60}

v = 6.76 m/s

so average velocity is 6.76 m/s

You might be interested in
Two objects are electrically charged. The net charge on one object is doubled. Therefore, the electric force _____.
creativ13 [48]
If net charge on one object is doubled, then electric force will also get double. It is because they are directly proportional to each other.

Hope this helps!
7 0
3 years ago
Read 2 more answers
What is imperceptible human motion?
castortr0y [4]
Unable to be noticed or not felt because of feeling slight
3 0
3 years ago
Form a hypothesis about how deeply water could erode and about how deeply glaciers could erode
Softa [21]
A hypothesis is an educated guess. It's your own opinion!
8 0
3 years ago
An object travels with a constant speed in a circular path. The net force on the object is
Pepsi [2]

Answer:

toward the center

Explanation:

Before answering, let's remind the first two Newton Laws:

1) An object at rest tends to stay at rest and an object moving at constant velocity tends to continue its motion at constant velocity, unless acted upon a net force

2) An object acted upon a net force F experiences an acceleration a according to the equation

F=ma

where m is the mass of the object.

In this problem, we have an object travelling at constant speed in a circular path. The fact that the trajectory of the object is circular means that the direction of motion of the object is constantly changing: this means that its velocity is changing, so it has an acceleration. And therefore, a net force is acting on it. The force that keeps the object travelling in the circular path is called centripetal force, and it is directed towards the center of the circle (because it prevents the object from continuing its motion straight away).

So, the correct answer is

toward the center

8 0
3 years ago
Neglecting air resistance, what maximum height will be reached by an arrow launched straight upward with an initial speed of 35
tankabanditka [31]
The velocity at the maximum height will always be 0. Therefore, you will count your final velocity as 0, and your initial velocity as 35 m/s. Next, we know that the acceleration will be 9.8 m/s^2. How? Because the ball is thrown directly upward, and the only force acting on it will be the force of gravity pushing it back down.

The formula we use is h = (Vf^2 - Vi^2) / (2*-9.8m/s^2)

Plugging everything in, we have h = (0-1225)/(19.6) = 62.5 meters is the maximum height.
3 0
3 years ago
Other questions:
  • What is the density of the baseball?
    10·2 answers
  • A bowling ball traveling with constant speed hits the pins at the end of a bowling lane 16.5 m long. The bowler hears the sound
    9·1 answer
  • An astronaut notices that a pendulum which took 2.45 s for a complete cycle of swing when the rocket was waiting on the launch p
    6·1 answer
  • All of the following are ways in which sedimentary rocks form EXCEPT
    11·1 answer
  • Where might you look on the internet to find good scientific information about illness
    10·2 answers
  • Which of the following is one way of preventing poisoning?
    12·1 answer
  • Explain why you poured the water into water before you identify the smell ?
    14·1 answer
  • Problem:
    10·1 answer
  • 1. Objects become electrically charged as a result of the transfer of
    14·1 answer
  • a body of mass 4 kg moves around a circle of radius 6 m with a constant speed of 12m/sec². calculate tw angular velocity and the
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!