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
pychu [463]
3 years ago
10

A 2000 kg truck is traveling at 5 m/s and collides with a 1000 kg car that is not moving. After the collision, the 2000 truck st

ands still. How fast did the 1000 kg car move? (Elastic)
A) 10 m/s
B) 5 m/s
C) 7 m/s
D) 0 m/s
Physics
1 answer:
sp2606 [1]3 years ago
3 0

Answer:

A) 10 m/s

Explanation:

We know that according to conservation of momentum,

m1v1 + m2v2 = m1u1 + m2u2  ..............(equation 1)

where m1 and m2 are masses of two bodies, v1 and v2 are initial velocity before collision and u1 and u2 are final velocities after collision respectively.

From the given data

If truck and car are two bodies

truck :       m1 = 2000 Kg           v1 = 5 m/s                u1 = 0

car    :        m2 = 1000 kg           v2 = 0                      u2 = ?

final velocity of truck and initial velocity of car are static because the objects were at rest in the respective time.

substituting the values in equation 1, we get

(2000 x 5) + 0 = 0 + (1000 x u2)

u2 = \frac{2000}{1000} x 5

    = 10 m/s

Hence after collision, car moves at a velocity of 10 m/s

You might be interested in
Check cashing businesses do not require that an individual be an account holder; they will cash any valid check. True False
Romashka-Z-Leto [24]
True. Free trade means they can't refuse to give you cash for a check. If you want the check deposited to an account, that's another story.
3 0
3 years ago
Read 2 more answers
What is Albert Einstein’s contribution to the understanding of nuclear energy?
Phoenix [80]
Einstein's equations showed that matter could be converted into energy; and vice-versa
☺☺☺☺
7 0
3 years ago
Read 2 more answers
What are the ways of heat transfer?
AnnZ [28]

Answer:

Conduction, Convection and Radiation

Explanation:

Hope this helps!

7 0
3 years ago
Read 2 more answers
Is cell using oxygen to break down sugar a physical or chemical change
Viefleur [7K]
Breaking down sugar (glucose) is a chemical change. Sugar is a compound that can be broken down.
5 0
3 years ago
Read 2 more answers
In a research facility, a person lies on a horizontal platform which floats on a film of air. When the person's heart beats, it
anastassius [24]

Answer: 3.48g

Explanation:

here, we will be using conservation of momentum to solve the problem. i.e the total momentum remains unchanged, unless an external force acts on the system. We'll in thus question, there is no external force acting in the system.

Remember, momentum = mass * velocity, then

mass of blood * velocity of blood = combined mass of subject and pallet * velocity of subject and pallet

Velocity of blood = 56.5cm = 0.565m

mass of blood * 0.565 = 54kg * (0.000063/0.160)

mass of blood * 0.565 = 54 * 0.00039375

mass of blood * 0.565 = 0.001969

mass of blood = 0.00348kg

Thus, the mass of blood that leaves the heart is 3.48g

7 0
3 years ago
Read 2 more answers
Other questions:
  • A motor with an input power of 100 Watts is connected to a flywheel . How long in units of hours must the motor operate to trans
    6·1 answer
  • 9. An astronaut of mass 90 kg walks in space outside her spaceship and receives a 30-N force from a nitrogen spurt gun. What acc
    15·2 answers
  • Alculate the potential difference if 20J of energy are transferred by 8C of charge.
    14·1 answer
  • Which part of the atom is not found in the nucleus
    8·1 answer
  • What happens to matter when we add or take away heat energy?
    15·1 answer
  • The critical angle for refraction from glass to air is 30° and that from water to air is 37°.Find the critical angle for refract
    7·1 answer
  • 1. Which of the following best describes the movement of an object at rest if no outside forces act on it?
    6·2 answers
  • How do you calculate the rate of change of velocity
    6·1 answer
  • What causes hot spot volcanoes to form?
    14·1 answer
  • A .25 kg ball initially at rest is hit with a 460 N impact. What is the impulse for the ball if it ends up moving at 40 m/s?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!