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
katen-ka-za [31]
3 years ago
11

A car is being driven along a road at 25m/s when the driver suddenly notices that there is a fallen tree blocking the road 65m a

head. The driver immediately applies the brakes giving the car a constant velocity of 5m/s2. How far in front of the tree does the car come to rest?
Physics
1 answer:
Anuta_ua [19.1K]3 years ago
3 0

Hi there!

We can use the following equation to solve for displacement:

vf² = vi² + 2ad, where:

vf = final velocity

vi = initial velocity

a = acceleration

d = displacement

Since the car will come to rest, vf = 0, so:

0 = vi² + 2ad

Plug in the given values:

0 = 25² + 2(-5)d (Breaking is a negative acceleration in this instance)

Solve:

0 = 25² - 10d

10d = 625

d = 62.5m

Subtract from the total distance from the car to the tree:

65 - 62.5 = 2.5m

You might be interested in
Walking across a carpet can build up a charge by ?<br> A. Contact<br> B. Friction<br> C. Induction
AlladinOne [14]
Walking across a carpet can build up a charge due to friction
5 0
3 years ago
Read 2 more answers
Which molecules are in put in photosynthesis
Dmitry_Shevchenko [17]

Answer:

During the process of photosynthesis, cells use carbon dioxide and energy from the Sun to make sugar molecules and oxygen. These sugar molecules are the basis for more complex molecules made by the photosynthetic cell, such as glucose.

Explanation:

yes.

6 0
3 years ago
Read 2 more answers
Vestobular receptors enable one to balance. <br><br> True or False
frozen [14]
The answer is actually true. i just took the test and i put false and it was wrong
5 0
3 years ago
Read 2 more answers
An RLC circuit with a resistor of R\:=\:1 R = 1 k, capacitor ofC\:=\:3 C = 3 F, and inductor ofL\:=\:2 L = 2 H reaches a maximum
frez [133]

Answer:

Magnetic energy stored in the inductor when all of the energy in the circuit is in the inductor = 0.049 mJ

If all the energy is then transferred into the capacitor, the voltage drop across the capacitor = 0.00572 V = 0.01 V (expressed to the hundredths value)

Explanation:

In an RLC circuit with maximum current of 7mA = 0.007 A

When all of the energy is stored in the inductor, maximum current will flow through it,

Hence E = (1/2) LI²

L = inductance of the inductor = 2 H

E = (1/2) (2)(0.007²) = 0.000049 J = 0.049 mJ

When all the energy in the circuit is in the capacitor, this energy will be equal to the energy calculated above.

And for a capacitor, energy is given as

E = (1/2) CV²

E = 0.000049 J, C = 3 F, V = ?

0.000049 = (1/2)(3)(V²)

V = 0.00572 V = 0.01 V

4 0
3 years ago
The speed of sound is 344 m/sec when the air is 20 degrees Celsius how far is the source of the sound if it takes 8 seconds for
pishuonlain [190]

Answer: 2752 m

Explanation:

344*8=

5 0
3 years ago
Other questions:
  • What technology brought about the end of the open range and large cattle drives in the American west? A. Gatling guns B. TNT C.
    12·1 answer
  • Use the periodic table and your knowledge of isotopes to complete these statements.
    15·2 answers
  • A centripetal force causes circular motion because it accelerates an object
    9·1 answer
  • Consider a beam of electromagnetic radiation of a single frequency. The energy of each photon in this beam depends on each of th
    9·1 answer
  • What is scientific concensus?
    10·1 answer
  • Can someone help me please ??
    15·1 answer
  • A 1.5 kg 8-Ball is traveling at 2.3 m/s to the right when it strikes and bounces off a 5.2 kg bowling ball which is at rest. Aft
    9·1 answer
  • 11. What is the name of earth's layer on which we live?<br><br>​
    10·1 answer
  • a basketball player jumped straight up to grab a rebound. If she was in the air for .8 second how high did she jump
    9·1 answer
  • In-Class Problem #2
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!