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
Murljashka [212]
3 years ago
12

A bicyclist in the Tour de France crests a mountain pass as he moves at 18 km/h. At the bottom, 4.0 km farther, his speed is at

75 km/h. What is the average acceleration (in m/s^2) while riding down the mountain?
Physics
1 answer:
Allisa [31]3 years ago
6 0

We are given:

v0 = initial velocity = 18 km/h

d = distance = 4 km

v = final velocity = 75 km/h

a =?

<span>
We can solve this problem by using the formula:</span>

v^2 = v0^2 + 2 a d

 

75^2 = 18^2 + 2 (a) * 4

5625 = 324 + 8a

<span>a = 662.625 km/h^2</span>

You might be interested in
Answer question quick
Anettt [7]

Answer:

Yes , insulation has no role

5 0
3 years ago
What additional information do you need to prove ∆ABC ≅ ∆DEF by the SAS Postulate?
miv72 [106K]

Answer:

Option A

You need a Angle C congruent to angle F

Explanation:

EX) Side angle Side = sas

6 0
3 years ago
Let’s say I am in a bumper car and have a velocity of 14 m/s, driving in the positive x-direction. I and my bumped car have a ma
AlekseyPX

Answer:

160 kg

12 m/s

Explanation:

m_1 = Mass of first car = 120 kg

m_2 = Mass of second car

u_1 = Initial Velocity of first car = 14 m/s

u_2 = Initial Velocity of second car = 0 m/s

v_1 = Final Velocity of first car = -2 m/s

v_2 = Final Velocity of second car

For perfectly elastic collision

m_{1}u_{1}+m_{2}u_{2}=m_{1}v_{1}+m_{2}v_{2}\\\Rightarrow m_2v_2=m_{1}u_{1}+m_{2}u_{2}-m_{1}v_{1}\\\Rightarrow m_2v_2=120\times 14+m_2\times 0-(120\times -2)\\\Rightarrow m_2v_2=1920\\\Rightarrow m_2=\frac{1920}{v_2}

Applying in the next equation

v_2=\frac{2m_1}{m_1+m_2}u_{1}+\frac{m_2-m_1}{m_1+m_2}u_2\\\Rightarrow v_2=\frac{2\times 120}{120+\frac{1920}{v_2}}\times 14+\frac{m_2-m_1}{m_1+m_2}\times 0\\\Rightarrow \left(120+\frac{1920}{v_2}\right)v_2=3360\\\Rightarrow 120v_2+1920=3360\\\Rightarrow v_2=\frac{3360-1920}{120}\\\Rightarrow v_2=12\ m/s

m_2=\frac{1920}{v_2}\\\Rightarrow m_2=\frac{1920}{12}\\\Rightarrow m_2=160\ kg

Mass of second car = 160 kg

Velocity of second car = 12 m/s

5 0
3 years ago
What relationship exists between speed, velocity, and acceleration
enyata [817]
Velocity is speed and the direction of the speed. Acceleration is the rate at which Velocity is changing, and the direction in which it's changing.
6 0
3 years ago
15. A car is stationary at the top of a hill with the engine
White raven [17]

Answer:

kinetic energy

Explanation:

hop it is helpful

mark me brainlist

5 0
3 years ago
Other questions:
  • Cotton has a higher tendency to attract electrons than human skin. When Kevin pulls his cotton shirt off his body, the electrons
    11·2 answers
  • I) A 100 W and 60 W bulb are joined in series and connected to the mains. Which bulb
    14·1 answer
  • Cathode ray tubes (CRTs) used in old-style televisions have been replaced by modern LCD and LED screens. Part of the CRT include
    11·1 answer
  • Condensation and rarefaction in a longitudinal wave correspond, respectively, to what parts of a transverse wave? Group of answe
    6·1 answer
  • What color is the sky
    12·2 answers
  • 1. Find the period of a tuning fork that vibrates 120 times/sec.?? I will give brainlest​
    7·1 answer
  • Please select the word from the list that best fits the definition
    6·1 answer
  • Gravity is a force that pulls an object down towards the Earth. Can we see the force of gravity?
    6·2 answers
  • A particular laser developed in 1995 at the University of Rochester, in New York, produced a beam of light that lasted for about
    11·1 answer
  • Gabrielle has just upgraded her oil-burning furnace. Her new furnace takes cool air from outside and passes it through the heat
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!