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
gulaghasi [49]
2 years ago
12

A cyclist is riding his bike up a mountain trail. When he starts up the trail, he is going 8 m/s. As the trail gets steeper, he

slows to 3 m/s in 1 minute. What is the cyclist's acceleration?Felipe drives his car at a velocity of 28 m/s. He applies the brake, which slows the vehicle down at a rate of 6.4 m/s2 and causes it to slow to a stop. How long does it take for the car to stop? Round your answer to the nearest tenth.
Physics
1 answer:
shusha [124]2 years ago
3 0

Answer:

a)   a = - 0.0833 m / s²,  b)   t = 4.4 s

Explanation:

a) this is a kinematics exercise where the acceleration is along the inclined plane

         v = v₀ - a t

         a = v₀ - v / t

         a = 3 - 8/60

         a = - 0.0833 m / s²

b) in this case the final velocity is zero

         v = v₀ - a t

         0 = v₀ - at

         t = v₀ / a

         t = 28 / 6.4

         t = 4.375 s

         t = 4.4 s

You might be interested in
You throw a ball downward from a window at a speed of 2.5 m/s. how fast will it be moving when it hits the sidewalk 2.1 m below?
Otrada [13]
List out all the variables that you do know; 

acceleration=-9.8 ms⁻¹ (this remains constant on Earth)
Final velocity=?
Displacement (s)= -2.1 m 
Initial Velocity(u)=2.5 ms⁻¹

v²=u²+2as 
v²=(2.5)²+2(-9.8)(-2.1)
v²=47.41 
v=√47.41 
v=6.88549 ≈ 6.9 ms⁻¹ 

Hope I helped :) 
4 0
3 years ago
The diagram shows steps and structures involved in protein production. The arrow labeled X is pointing to
damaskus [11]

Answer:

It is a ribosome

5 0
3 years ago
Read 2 more answers
What piece of equipment would a hospital most likely have as back up in case of a power failure?
Shalnov [3]

B. a generator

Hope I could help!

4 0
3 years ago
Read 2 more answers
A spring with k = 500 N/m stores 704 J. How far is it extended from the equilibrium position
kaheart [24]

Given that:

k = 500 n/m,

work (W) = 704 J

spring extension (x) = ?

         we know that,

                      Work = (1/2) k x²

                          704 = (1/2) × 500 × x²

                            x = 1.67 m

A spring stretched for 1.67 m distance.

4 0
3 years ago
A parallel-plate capacitor has an area of 4.59 cm2, and the plates are separated by 1.28 mm with air between them. it stores a c
nalin [4]
 <span>a) 
Capacitance = k x ε° x area / separation 
ε° = 8.854 10^-12 F/ m 
k = 2.4max 
average k = 0.78 / 1.27 * 2.4 +(1.27- 0.78) / 1.27 * 1 = 1.474 + 0.386 = 1.86 
(61.4 % separation k = 2.4 --- 38.6 % k = 1 air --- average k = 0.614 * 2.34 + 0.386 * 1 = 1.86 
area = 145 cm2 = 0.0145 m2 
separation = 1.27 cm 0.0127 m 

C = 1.86 * 8.854 10^-12 * 0.0145 / 0.0127 = 18.8 pF 
b) Q = C * V --- 18.8 * 83 = 1560.4 pC = 1.5604 nC 
c) E = V / d = 83 / 0.0127 = 6535.4 V/m </span>
7 0
3 years ago
Other questions:
  • A freight car moves along a frictionless level railroad track at constant speed. The car is open on top. A large load of coal is
    15·1 answer
  • A 60 kg student is standing in the train station next to her 10 kg suitcase when her train is called. (A) Estimate how much work
    9·1 answer
  • Suppose that an electromagnetic wave is traveling toward the east. At one instant at a given point, the electric field vector po
    11·1 answer
  • termine the values of mm and nn when the following mass of the Earth is written in scientific notation: 5,970,000,000,000,000,00
    6·1 answer
  • Bumper cars A and B undergo a collision during which the momentum of the combined system is conserved.
    12·1 answer
  • A SpaceX rocket launched from the Boca Chica space port must attain a speed of 10000 m/s during the first 6 minutes of flight. U
    8·1 answer
  • #2 Most of Earth's weather takes place in the O troposphere O stratosphere O mesosphere thermosphere​
    15·1 answer
  • In an experiment to measure the specific heat capacity of copper, 0.02 kg of water at 70°C is poured into a copper calorimeter (
    14·1 answer
  • g What is the separation between their paths in meters when they hit a target after traversing a semicircle
    14·1 answer
  • Which statement illustrates how progress in engineering has affected the natural enironment
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!