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
Elan Coil [88]
3 years ago
14

If an 800.0 Kg sports car slows to 8.0 m/s in the forward direction to check out an accident scene and a 1200.0 kg pick-up truck

behind them continues traveling at 15.0 m/s forward, with what velocity will the two move if they lock bumpers after a rear-end collision
Physics
1 answer:
Karo-lina-s [1.5K]3 years ago
8 0

Answer:

<h2><u>12.2m/s</u></h2>

Explanation:

Step one:

given data

mass m1=800kg

velocity v1=8m/s

mass m2= 1200kg

velocity v2=15m/s

Note: the two bodies move with the same velocity after collision, hence the common velocity is v=?

Step two:

the expression for the total momentum is

m1v1+m2v2=v(m1+m2)

substituting we have

800*8+1200*15=v(800+1200)

6400+18000=v(2000)

24400=2000v

divide both sides by 2000 to find v

v=24400/2000

v=12.2m/s

<u>Their common velocity is 12.2m/s</u>

You might be interested in
Anyone tell me what is the physics​
Katyanochek1 [597]

Answer:

physic is branch of science in which math is its brother and will deal with the equation,law and evidence of natural phenomenon.

6 0
3 years ago
Picture question please answer do in 5 mins
alexandr402 [8]

Answer:

Can't see anything, please share clearly

4 0
3 years ago
One end of a horizontal spring with force constant 130.0 Ni'm is attached to a vertical wall. A 4.00-kg block sitting on the flo
tekilochka [14]

Answer:

Explanation:

When the spring is compressed by .80 m , restoring force by spring on block

= 130 x .80

= 104 N , acting away from wall

External force = 82 N , acting towards wall

Force of friction acting towards wall = μmg

= .4 x 4 x 9.8

= 15.68 N

Net force away from wall

= 104 -15.68 - 82

= 6.32 N

Acceleration

= 6.32 / 4

= 1.58 m / s²

It will be away from wall

Energy released by compressed spring = 1/2 k x²

= .5 x 130 x .8²

= 41.6 J

Energy lost in friction

= μmg x  .8

= .4 x 4 x 9.8 x .8

= 12.544 J

Energy available to block

= 41.6 - 12.544 J

= 29 J

Kinetic energy of block = 29

1/2 x 4 x v² = 29

v = 3.8 m / s

This will b speed of block as soon as spring relaxes. (x = 0 )

4 0
3 years ago
(Will give brainliest)
Sveta_85 [38]

Answer:

b.) Length

Explanation:

The length of the string can be changed by removing it from the slotted bracket and placing it back  in. You can change the mass by varying the number of washers on the mass hanger. The amplitude  can be changed by varying the starting angle of the pendulum (low, medium, and high angle). sorry if wrong

8 0
2 years ago
Why physics is difficult????<br><br>Especially in Electromagnetism...​
morpeh [17]

Because you have to study about electricity, first of all, and also need to study about polarity

3 0
3 years ago
Read 2 more answers
Other questions:
  • Light from the sun reaches Earth in 8.3min. The speed of light is 3.00 x 10^8 m/s. How far is the Earth from the sun?
    11·2 answers
  • A scientist studies the effect of adding different amounts of salt on the boiling point of water. He places his results in the g
    9·2 answers
  • Isabela is an astronomer studying stars A and B. Star A is farther away from Isabela and yet when Isabela observes the stars, th
    13·1 answer
  • Pain in the squadron can be a sign of appemditicis
    9·2 answers
  • PLEASE HELP!!!
    10·2 answers
  • Another droplet of the same mass falls 8.4 cm from rest in 0.250 s, again moving through a vacuum. Find the charge carried by th
    7·1 answer
  • Calculate the force needed to move a 2kg mass with an acceleration of 5ms-2
    14·1 answer
  • How long would it take a boat that started at rest to get to a velocity of 56 m/s if it was accelerating at 17 m/s/s?
    8·1 answer
  • Do you think humans are messing up the world's balance between organisms? Explain.
    7·2 answers
  • At the very end of 500 DAYS OF SUMMER, Tom (Joseph Gordon-Levitt) is so heartbroken by
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!