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
Sauron [17]
3 years ago
6

Two car collide in an intersection. The speed limit in that zone is 30 mph. The car (mass of 1250 kg) was going 17.4 m/s (38.9).

The truck (2020 kg) t-boned the car in the middle of the intersection. The car was slowed down to only 6.7 m/s. The truck after colliding with the car was going 10.3 m/s. How fast did the truck go into the intersection?
Physics
1 answer:
Musya8 [376]3 years ago
5 0

Answer:

u₂ = 3.7 m/s

Explanation:

Here, we use the law of conservation of momentum, as follows:

m_1u_1+m_2u_2=m_1v_1+m_2v_2\\

where,

m₁ = mass of the car = 1250 kg

m₂ = mass of the truck = 2020 kg

u₁ = initial speed of the car before collision = 17.4 m/s

u₂ = initial speed of the tuck before collision = ?

v₁ = final speed of the car after collision = 6.7 m/s

v₂ = final speed of the truck after collision = 10.3 m/s

Therefore,

(1250\ kg)(17.4\ m/s)+(2020\ kg)(u_2)=(1250\ kg)(6.7\ m/s)+(2020\ kg)(10.3\ m/s)\\\\(2020\ kg)(u_2) = 8375\ N.s + 20806\ N.s - 21750\ N.s\\\\u_2=\frac{7431\ N.s}{2020\ kg}

<u>u₂ = 3.7 m/s</u>

You might be interested in
The structure of which substances tends to exhibit the greatest hardness?
bagirrra123 [75]

The answer is C. ionic compounds, compared to another hard compound which is the covalent bond, the structure of the ionic compound is lattice or crystalline in form thus less room for imperfections on its structure compared to the latter choices.

3 0
3 years ago
Imagine you could travel to the moon where the acceleration due to gravity is 1.6 m/s^2. What would be the period of
VladimirAG [237]

Answer:

4.9612 s

Explanation:

Applying,

T = 2π√(L/g)............... Equation 1

Where T = period of the pendulum, L = Lenght of the pendulum, g = acceleration due to gravity of the moon, π = pie.

From the question,

Given: L = 1 m, g = 1.6 m/s²

Constant: π = 3.14

Substitute these values into equation 1

T = 2×3.14×√(1/1.6)

T = 6.28√(0.625)

T = 6.28×0.79

T = 4.9612 s

6 0
3 years ago
Determine the energy, in electron volts, of an emitted photon when an electron transition from n=3 to n=2 occurs
tensa zangetsu [6.8K]
Give me some answer choices and i will be happy to help
7 0
3 years ago
What is the momentum of a .005kg bumble bee that is traveling at a velocity of 3.0m/s?
stiks02 [169]

p=mv

p=0.005kg×3.0m/s

p= 0.015kgm/s

4 0
3 years ago
The owners want the speed at the bottom of the first hill doubled. How much higher must the first hill be built?
Sonja [21]
Neglecting friction and air resistance, the first hill must be built 4 times higher than it is now.
3 0
3 years ago
Other questions:
  • 1 pts<br> How can two different nonmetals form a compound?
    7·1 answer
  • 6x+y=6 <br> 8x-2y=-1 <br><br> con solución de sistemas de ecuaciones por favor
    7·1 answer
  • A 0.035 kg shooter marble with a velocity of 0.77 m/s. forward, hits a 5.2 x 10-³ kg marble that is at rest. The
    9·1 answer
  • On a windless day, two identical balls P and Q are dropped from the top and the middle of a tower at exactly the same time as sh
    5·1 answer
  • How would the Earth move if the sun (including its gravity) suddenly disappeared? Explain your answer.
    5·1 answer
  • Help!!!! ASAP!!! A loop of area 0.100 m^2 is oriented at 15.5 degree angle to a 0.500 T magnetic field. It rotates until it is a
    5·1 answer
  • С какой скоростью велосипедист проходит закругление велотрека радиусом 25 м, если центростремительное ускорение при этом 4 м/с2?
    7·1 answer
  • Balance the equation<br>H3PO4 + NaOH --&gt;Na3PO4 + H2O​
    7·1 answer
  • 4. Physical scientists have helped develop<br> ceramics, plastics, and
    7·1 answer
  • Acceleration deceleration all rules
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!