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
luda_lava [24]
3 years ago
14

A police car is located 50 feet to the side of a straight road. A red car is driving along the road in the direction of the poli

ce car and is 140 feet up the road from the location of the police car. The police radar reads that the distance between the police car and the red car is decreasing at a rate of 70 feet per second. How fast is the red car actually traveling along the road?

Physics
1 answer:
NNADVOKAT [17]3 years ago
6 0

Answer:74.33 feet per sec

Explanation:

Given

Police car is 50 feet side of road

Red car is 140 feet up the road

Distance between them is decreasing at the rate of 70 feet per sec

From figure

x^2+y^2=z^2

z=\sqrt{140^2+50^2}

z=148.66 feet

as the red car is moving

therefore its velocity magnitude is given by

\frac{\mathrm{d} x}{\mathrm{d} t}

2x\times \frac{\mathrm{d} x}{\mathrm{d} t}+0=2z\frac{\mathrm{d} z}{\mathrm{d} t}

x\frac{\mathrm{d} x}{\mathrm{d} t}=z\frac{\mathrm{d} z}{\mathrm{d} t}

140\times \frac{\mathrm{d} x}{\mathrm{d} t}=148.66\times 70

\frac{\mathrm{d} x}{\mathrm{d} t}=74.33 feet\ per\ sec

You might be interested in
Nose bleeding occurs as we move towards high altitude, why?
Irina18 [472]
Nosebleeds can be caused by being up in a very high altitude. As you climb higher, the amount of oxygen in the air decreases. This makes the air thinner and dryer, which can in turn cause the inside of your nose to crack and bleed.F
7 0
2 years ago
Read 2 more answers
What is one property of iodine
mamaluj [8]

Answer: I2

Explanation:

6 0
3 years ago
The forces that hold different atoms or ions together are
denis23 [38]

Answer:

Chemical bonds

Explanation:

The chemical bonds hold the different type atoms or ions together.

The type of chemical bonds :

1. Ionic bond  ;

 Ions or atoms changes the electron and form ionic bond.Those atoms gains the electron gets negative charge and those atoms donate the electron gets positive charge.

2.Covalent bond :

  In this type of bond atoms share the electrons and form covalent bonds.

3. Metallic bond :

This type of bond are present in the metals.In this atoms are used free electrons to form bonds.

Therefore answer is --

Chemical bonds

 

7 0
3 years ago
What is shearing? is it means taking out the hair of the sheep
ICE Princess25 [194]

Answer:

Thats  a greate quiestionm look it up

Explanation:

5 0
3 years ago
Read 2 more answers
A 1.5 kg ball is dropped from a height of 2.Gm. Assuming energy is
Vikki [24]

Answer:

Plug in the given values and solve for the final velocity. Remember, when the ball is on the ground it has a height of zero.

Explanation:

6 0
2 years ago
Other questions:
  • Chemists use a wide array of techniques for determining the exact composition and structure of a compound. One of the most robus
    10·1 answer
  • The equation that is used to solve second law problems is # F= ma.
    8·1 answer
  • The frequency of the second harmonic of a certain musical instrument is 100 Hz. What is the fundamental frequency of the instrum
    13·1 answer
  • A 10 Newton effort force is required to lift a 10 kg box just off the ground. What is the effort required to lift the box off th
    6·2 answers
  • The slope of a distance time graph is equal to what
    10·1 answer
  • A sphere made of rubber has a density of 1.00 g/cm3 and a radius of 8.00 cm. It falls through air of density 1.20 kg/m3 and has
    6·2 answers
  • Bob runs 1800 seconds at an average speed of 1.5 m/sec. How far did he go? 25 Points!!!!
    15·1 answer
  • In most food chains all of the energy originally comes from
    8·1 answer
  • How would you produce electricity using a magnet
    7·1 answer
  • he fan blades on a jet engine make one thousand revolutions in a time of 54.9 ms. What is the angular frequency of the blades?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!